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L161 O-1096

Three New Fleas of the Genus Strepsylla Traub
(Siphonaptera : Hy strichopsyllidae)

Robert Traub^
Research Associate, Division of Insects

AND

Alfredo Barrera^

It is particularly appropriate to include in the present volume a
paper on the genus Strepsylla Traub, 1950, a group of rodent fleas
which were discovered partly as a result of Dr. Schmidt's interest
in the fauna of Guatemala and Mexico.

The genus Strepsylla (subfamily Neopsyllinae) to date includes
four species, all of which were collected from various rodents in
Mexico. The present paper includes the description of three addi-
tional species from similar hosts, one from Guatemala and two from
Mexico. This study is based upon material collected during investi-
gations of arthropods of potential medical importance. The studies
were sponsored by United States or Mexican governmental agencies.

Strepsylla dalmati sp. nov. Plate 10; plate 11, fig. 1; plate 12,
fig. 1; plate 13, fig. 1.

Separable from all known Strepsylla in that the last segment of
the metatarsus has only four pairs of plantar bristles, the proximal
or ventral pair being absent. Separable from described species, but
agreeing with the new species next discussed, in that the dorsal
margin of the male immovable process (pi. 10, fig. 3, P., and pi. 12,
fig. 1) is evenly convex instead of somewhat sinuate (cf. pi. 12, fig.
3, P.) and in that there is a dense patch of many thin short bristles
above and /or proximal to the recurved spiniform on the distal arm

1 Lieutenant Colonel, M.S.C., Department of Entomology, Army Medical
Service Graduate School, Walter Reed Army Medical Center, Washington, D.C.

2 Escuela Voeacional Num. 4 de Ciencias Biologicas (LP.N.) Prol. Lauro
Aguirre, Sto. Tomas, Mexico, D.F.

541

542 FIELDIANA: ZOOLOGY, VOLUME 37

of the male ninth sternum (pi. 10, fig. 2) instead of the usual 3-6
thin bristles (cf. pi. 11, fig. 3). Also diagnostic for this species is the
hyperdevelopment of the disto-dorsal lobes of the aedeagus (pi. 13,
fig. 1, D.L.) as compared with the apparent reduction or lack of
development of the lateral lobes (L.L.), with the result that D.L.
extends well caudad of L.L. (cf. pi. 13, fig. 4).

Head, male (pi. 10, fig. 1): Frontal tubercle small, acute, median. First pre-
antennal row consisting of five or six small bristles; second row of four much longer
bristles, that near eye (third bristle) shorter than others of row. Genal ctenidium
arising immediately ventral to reduced eye; mesal spine acuminate, extending
beyond subrounded, overlapping, shorter, lateral spine. Maxillary lobe ex-
tending to apex of third segment of maxillary palpi. Labial palpi five-segmented,
extending to base of fore-trochanter. Scape of antenna with very short proximal
and subapical bristles. Second antennal segment with an apical fringe of small
bristles, not extending beyond second segment of fairly symmetrical club. Post-
antennal region with two rows of bristles arranged approximately 4-4(5), these
rows preceded by a fairly long bristle near base of scape.

Thorax (pi. 10, fig. 1, pi. 11, fig. 1): Pronotum with one row of about six large
bristles on a side, these with smaller and thinner intercalary bristles somewhat
displaced caudad. Pronotal comb with a total of about 14 fairly broad spines.
Mesonotum (MSN.) with three rows of bristles, bristles of last row much larger
than the others. Mesonotal flange on each side with two pseudosetae {PS.S.).
Mesepisternum (MPS.) with a short median bristle and a long submedian one.
Mesepimeron (MPM.) with four bristles, that near ventral margin longest. Me-
tanotum (MTN.) with two rows of bristles and an anterior third row indicated
by two or three small bristles. Lateral metanotal area (L.M.) well demarcated;
one ventral bristle near caudal angle. Metepisternum (MTS.) with three bristles
near postero-dorsal angle; one very long, the others very short. Squamulum
(SQ.) short and broad, weakly sclerotized. Pleural arch (PL.A.) strongly convex,
well developed. Metepimeron (MTM.) with an anterior row of four thin bristles
and a posterior group of four stout ones, three of the latter quite long.

Legs: Metacoxa with a short patch of mesal spiniforms at anterior margin of
distal fourth. Profemur with about nine small thin lateral bristles. Longest
bristles of tarsus of foreleg occur on segment I, where two dorso-lateral ones reach
to near apex of second segment. Metatarsus with second segment bearing an
apical bristle extending to near apex of fourth segment. No bristles on any other
tarsal segment reaching beyond apex of following segment. Fifth segment of
pro- and mesotarsus with five pairs of plantar bristles, but the first pair displaced
mesad, ventral in position and inserted between the basal lateral pair of plantar
bristles; this ventral pair absent on metatarsus. Measurements (in microns) of
tibiae and segments of tarsi (petiolate base deleted) as follows:

Leg

Tibia

Tarsal Segments

I

II III IV

V

Pro-

150

61

56 45 38

90

Meso-

238

118

85 59 42

96

Meta- 327 230 140 78 52 101

TRAUB AND BARRERA: NEW SPECIES OF STREPSYLLA 543

Abdomen: Terga with apical spinelets arranged as follows (total number):
9-12-8-8-4. Typical terga with two rows of bristles, both rows extending slightly
below level of somewhat sagittate spiracle. Unmodified sterna typically with
about two or three ventral bristles on a side. Three antepygidial bristles (pi. 10,
fig. 3, A.B.), middle one nearly twice as long as others.

Modified abdominal segments, male (pi. 10, fig. 3): Eighth tergum (ST.) arising
from region of base of A.B. and directed ventrad to middle of body, then turning
caudad, its margin lightly sclerotized; posterior margin recurving toward conspic-
uous eighth spiracle. Eighth tergum associated with a large, weakly sclerotized
downward-directed process, the lower half of which is a triangle {8T.T.) with an
acute apex. Eighth sternum {8S.) with a row of three long bristles per side near
ventro-caudal angle; about seven shorter bristles anterior to row, these mainly
marginal; dorsal margin convex, extending to near base of immovable process of
clasper; posterior margin slightly sinuate, rounded at junction with ventral margin.

Immovable process of clasper (P. and pi. 12, fig. 1) broader (higher) than
long, with a dorso-marginal row of thin bristles, a caudo-marginal row of similar
but more widely spaced bristles on distal third only, and a subapical mesal patch
of about six small thin curved bristles; dorsal margin slightly but evenly convex.
The only bristle on the lower portion of P. is immediately below the insertion of
the movable finger (F.) and may represent the acetabular bristle (s) of cerato-
phyllid fleas. Sclerotized process above acetabular region (herein termed "ace-
tabular shore," A.SH.), subtruncate, with one subdorsal bristle and two apico-
marginal bristles. Base of clasper (CL.) arising from level of antepygidial bristles.
Movable finger or digitoid (F. and pi. 12, fig. 1) slightly more than twice as long
as broad at maximum; anterior margin biconcave; caudal margin evenly rounded
from apex to near midpoint but then becoming emarginate as digitoid is proximally
somewhat constricted; ventral margin quite straight. Movable finger with a
caudo-marginal row of bristles extending from apex to midpoint, and a group of
about six lateral and three mesal thin bristles at level of midline; apical half with
thin scattered small bristles, some submarginal. Manubrium (MB.) very long
and narrow and somewhat sinuate. Proximal arm of ninth sternum {P.A.9)
with apex expanded, its margin straight; the dorso-caudal angle produced into a
rounded short "nose" (NO.) which equals in length the acute antero-dorsal angle.
Distal arm of ninth sternum {D.A.9 and pi. 10, fig. 2) about as long as proximal
arm, its sclerotized portion slightly narrowing distally; apex ovate and bearing
two long narrow bristles, a stout bristle, a tiny bristle above this, and a conspicuous
short broad spiniform; a subapical group of thin median and submarginal bristles
below these; a marginal and submarginal dense row of thin bristles proximal to
level of origin of a truncate, semimembranous flap (FL.) that is spiculose apically.
This flap with a single, proximal curved (i.e., partially looped) spiniform near
ventral marpn; a thin bristle distal to spiniform on flap and another proximal
to it.

Aedeagus: Aedeagal apodeme (AE.A.) about four times as long as broad,
its cephalic end broad, somewhat rounded, slightly narrowed caudally. Aedeagus
proper shorter than apodeme. Base of very well-developed pouch wall (pi. 13,
fig. 1, B.P.W.) sclerotized, fairly straight, oblique. Ventral margin of wall of
aedeagal pouch (P.W.) well sclerotized and apically with a distinct ventral hump.
Median dorsal lobe (M.D.L.) shallowly sinuate, terminating at apex of rod-like
sclerite {A.S.T.) dorsal to base of sclerotized inner tube (S.I.T.). A broad,

544 FIELDIANA: ZOOLOGY, VOLUME 37

triangular sclerite, herein termed the cordate sclerite (CO.S.) overlying apical
portion of A.S.T. and part of S.I.T. Subapical dorsal lobe (S.D.L.) fairly well
differentiated. Disto-dorsal lobes (D.L.) well developed, about three times as
long as broad, arising from apex of A.S.T. ; apically subrounded. Lateral lobes
{L.L.) reduced, inconspicuous, not extending beyond apex of sclerotized inner
tube. Crochets {CR.) large, conspicuous, apparently somewhat articulating as a
ball-and-socket arrangement with the hump on P.W. Crochets longer than broad;
proximal portion broadly ovate; dorsally produced into a long narrow spur;
sclerotized portion appearing apically acuminate but actually with a lightly
sclerotized, dorsally convex wing extending to apex. Armature of inner tube
reduced, not visible. Crescent sclerite (C.S.) well developed. Lobes of apodemal
strut {AP.S.) not clearly differentiated. Ventral intramural rod {I.R.) of endo-
phallus distinct, terminating in a weakly sclerotized vesicle ( V.) ; semi-membranous
lunate structure (LU.S.) very narrow. Penis rods (P.R.) uncoiled. Third aedeagal
apodemal rod (A.A.R.) fairly well sclerotized.

Tenth abdominal segment with dorsal lobe of proctiger (pi. 10, fig. 3, D.A.L.)
bearing a dorso-marginal fringe of thin bristles. Ventral lobe of proctiger similar
but with apical bristles. Subanal sclerite (proximo-ventral sclerite of proctiger,
V.P.) well developed and bearing the relatively large semi-membranous dorsal
filamentous tuft (T.) characteristic of genus (see pi. 10, fig. 3; not shown in pi. 12,
fig. 1).

Comment. The species is named for Dr. Herbert T. Dalmat of
the United States Public Health Service, who has contributed much
to our knowledge of the natural history and control of arthropod-
borne diseases in Guatemala.

Holotype. Male, from Jalapa, five miles east of Mataquescuintla,
La Soledad Grande, Guatemala. Altitude 8,300 feet. Collected by
Luis de la Torre, March 21, 1952, on the Chicago Natural History
Museum Guatemala Zoological Expedition. Deposited in collections
of Chicago Natural History Museum. (No other specimen known.)
Host: Peromyscus guatemalensis.

Strepsylla schmidti sp. nov. Plate 11, figs. 2, 5; plate 12, fig. 2;
plate 13, fig. 4.
Near S. dalmati sp. nov. as indicated above, but separable in
that the last segment of the metatarsus is typical, i.e., with five
pairs of plantar bristles, although the proximal pair is smaller than
the others and displaced ventrad. Further distinguishable as follows:
Crochet (pi. 13, fig. 4, CR.) bifurcate, recurved dorsally so that the
stout upper lobe or spur extends nearly three-fourths as far apicad
as the ventral. Median portion of ventral margin of distal arm of
ninth sternum (pi. 11, fig. 2) sinuate and heavily sclerotized. In S.
dalmati, by contrast, the crochet lacks a caudad-directed upper lobe
pi. 13, fig. 1, CR.) and the D.A.9 (pi. 10, fig. 2) is ventrally straight
and weakly sclerotized.

TRAUB AND BARRERA: NEW SPECIES OF STREPSYLLA 545

Only pertinent differences from S. dalmati are listed. Labial palpi reaching
to apex of fore-trochanters. Metepimeron with bristles arranged 3-3-1. Fifth
segment of all tarsi with a ventral pair and four lateral pairs of plantar bristles.
Measurements (in microns) of tibiae and tarsal segments are as follows:

Leg

Tibia

Tarsal Segments

I

II III IV

V

Pro-

150

50

54 47 36

82

Meso-

254

113

82 54 44

94

Meta- 317 214 141 82 53 103

Terga with apical spinelets arranged as follows (total number): male, 4-8-4
(paratype, 3)-5(4)-2. Typical sterna with one or two small submarginal bristles
preceding the vertical row of three.

Modified abdominal segments, male: Eighth sternum (pi. 11, fig. 5) dorsally
and caudally fairly evenly rounded; two long bristles near ventro-caudal angle;
two smaller, thinner bristles above these; in addition, about 14 thin short
ventro-marginal bristles arranged in one or two irregular rows. Immovable
process of clasper (pi. 12, fig. 2, P.) essentially as in dalmati except as follows:
one or two lateral short bristles near dorso-caudal angle; acetabular shore par-
ticularly heavily sclerotized and with two or three marginal bristles at apex; two
marginal bristles at insertion of movable finger (F.). The lateral group of bristles
on digitoid near middle of posterior portion of F. consisting of 10-14 bristles.
Finger not noticeably constricted basally; anterior margin very slightly convex;
ventral portion of caudal margin evenly rounded. Proximal arm of ninth sternum
apically truncate but scarcely produced at antero-dorsal angle, while the "nose" at
dorso-caudal angle is conspicuous, relatively much longer than in S. dalmati sp. nov.
Distal arm of ninth sternum (pi. 11, fig. 2) lacking a subapical group of bristles;
basal two-thirds with ventral margin biconcave, the hump sclerotized.

Aedeagus (pi. 13, fig. 4) with disto-dorsal lobe (D.L.) not as specialized as in
S. dalmati sp. nov., its length only about one and one-half times the breadth of
the cordate sclerite (CO.S.). Lateral lobes (L.L.) extending well apicad of disto-
dorsal lobe; apically oblong-ovate. Crochets (CR.) very large, and bifurcate,
with an oblong-ovate ventral portion and a long, equally broad, recurved dorsal
spur that extends apicad about three-fourths of the length of the ventral lobe.
Sclerotized inner tube (S.I.T.) with ventral portion apically ribbed. Lunate
structure (LU.S.) fairly broad.

Holotype. Male (B 22037), from Chiapas, Mexico, 17 kilometers
northwest of Teopisca. Altitude 6,500 feet. Collected on August
31, 1953, by Deane P. Furman and M. A. Price of the University
of California, during investigations of Mexican ectoparasites sup-
ported by the Research and Development Board, Office of the Sur-
geon General, Department of the Army. Deposited in the United
States National Museum (no. 62614). Host: Peromyscus boylii
levipes.

Paratype. A male, partially castrated, with same data (B 22036)
in the collection of the senior author. Female unknown.

546 FIELDIANA: ZOOLOGY, VOLUME 37

Comment. The species is named for Dr. Karl Patterson Schmidt
in partial recognition of his contributions to our knowledge of the
fauna of Mexico and Central America.

Strepsylla villai sp. nov. Plate 11, figs. 3, 4; plate 12, fig. 3; plate
13, figs. 3, 5.
Belongs in the group of species in which P. is dorsally somewhat
sinuate and in which the postero-dorsal margin of P. is rather
humped, thereby agreeing with S. mina Traub, 1950, S. fautini
Traub, 1950, .S". davisae Traub and Johnson, 1952, and S. taluna
Traub and Johnson, 1952. Readily distinguishable from S. mina
by the absence of very long bristles on F. Separable from S. fautini
in that the lateral lobes of the aedeagus (pi. 13, fig. 5, L.L.) are
apically rounded, slightly expanded, instead of being ovate distally
and somewhat relatively narrowed subapically, and also in that the
distal arm of the male ninth sternum (pi. 11, fig. 3) is falcate, i.e.
produced into a fairly long beak instead of being merely a bluntly
rounded projection shorter than the length of the adjacent spiniform.
The falcate distal arm also separates this species from S. davisae.
Readily distinguishable from S. taluna in that the abdominal
spiracles (pi. 13, fig. 3) are lanceolate, apically rather pointed (as in
S. davisae), instead of being blunt, somewhat rounded.

Only pertinent differences from S. dalmati sp. nov. are listed. Lateral meta-
notal area with a short bristle below the long one. Second segment of metatarsus
with one bristle extending slightly beyond apex of fourth segment. Fifth segment
of all tarsi with a ventral pair and four lateral pairs of bristles. Measurements
(in microns) of tibiae and segments of tarsi as follows:

Leg

Tibia

Tarsal Segmentt

I

II

III

IV

V

Pro-

182

59

54

36

34

82

Meso-

220

87

101

78

35

90

Meta-

300

210

130

75

48

94

Male terga with apical spinelets as follows (total number) : 7-7-6-4. Typical
sterna with one or two small submarginal bristles preceding the vertical row of
three. Two antepygidial bristles, the upper bristle twice as long as the lower one.

Modified abdominal segments, male: Eighth sternum (pi. 11, fig. 4) emarginate,
the sinus on the caudal margin fairly shallow; a single long bristle near the ventro-
caudal angle, and one or two longish and two or three small submarginal bristles
near this angle; a marginal row of about 10-12 small bristles per side. Immovable
process (P., pi. 12, fig. 3) biconvex, with a dorso-marginal row of bristles, but with
a few gaps in the region of the fairly shallow sinus, the bristles submarginal in
the vicinity of the dorsal filamentous tuft (T.) ; a submarginal group of five or six
thin mesal bristles on the posterior hump; the apical half of the caudal margin

TRAUB AND BARRERA: NEW SPECIES OF STREPSYLLA 547

with thin bristles resembling those of the dorsal margin but more widely spaced;
about three submarginal long thin bristles in a line near attachment of F. Ace-
tabular shore (A.SH.) apically biconvex, each small projection bearing a small
bristle. Movable finger (F.) about two and a half times as long as broad; anterior
margin slightly convex; caudal margin curved except for a small crenulated
portion near the ventro-caudal angle; a row of marginal or submarginal thin
bristles on the apical two-thirds of the caudal margin; a group of 12 to 15 lateral
thin submarginal or median bristles at proximal third. Distal arm of ninth
sternum (pi. 11, fig. 3) with a stout subapical spiniform; above this, at angle of
falcate tip, three marginal bristles; ventral (apparently caudal) margin with a
stout bristle immediately below spiniform; five well-spaced thin marginal bristles
ranging from this stout bristle proximal to apical third of arm. The truncate,
semi-membranous flap (FL.) bearing a median, looped spiniform, with a row of
short thin marginal bristles distad and proximad to level of spiniform.

Aedeagus (pi. 13, fig. 5) with disto-dorsal lobes (D.L.) about three times as long
as broad, extending almost as far distad as the well-developed lateral lobes {L.L.).
Crochets very large, ventrally fairly evenly convex, with an elongate dorsal wing
which is longer than the remainder of the crochet is broad. Lateral lobes very
broad, about twice the diameter of the disto-dorsal lobes; apically slightly expanded,
rounded. Armature of inner tube {A.I.T.) represented as a dorsal wing of the
sclerotized inner tube {S.I.T.).

Holotype. Male, from Tlaxcala, Mexico, ten kilometers east of
Calpulalpam, collected August 23, 1952, by B. Villa R. Deposited
in United States National Museum (no. 62615). No other specimen
known. Host: Peromyscus difficilis amplus.

Comment. A female with the same data as the holotype may
prove to be referable to this species. It cannot be differentiated
from S. mina.

The species is named for the collector. Dr. Bernardo Villa R.,
the well-known mammalogist, who has graciously helped the authors
on many occasions.

Strepsylla taluna Traub and Johnson. Plate 13, fig. 2.

Strepsylla taluna Traub and Johnson, 1952, Amer. Mus. Nov., no. 1598,
pp. 10-13, figs. 5, 6, 8-10, and 14.

The male of this species was described from one specimen from
Neotomodon alsioni taken at Morelos, Mexico. A study of topotypic
material from the same host makes it possible to point out that the
crochet of the aedeagus (pi. 13, fig. 2, CR.) actually bears a lightly
sclerotized dorsal wing that extends to the apex of the acuminate
talon-like structure. The heavily sclerotized talon-like portion of
the crochet is much narrower than in Strepsylla villai sp. nov.,
and the crochet of S. taluna lacks the elongate dorsal spur of the
new species.

548 FIELD! AN A: ZOOLOGY, VOLUME 37

Additional records. One male, collected by B. Villa at Km. 43
on Cuemavaca Highway, Distrito Federal, Mexico. Host: Romero-
lagus diazi.

One male, collected by A. Barrera, December 22, 1951, at La
Venta, D.F., Mexico. Altitude 2,850 meters. Host: Peromyscus
maniculatus labecula.

One male, same data, but collected September 21.

One male, collected by A. Barrera, October 12, 1951, at El
Zarco, D.F., Mexico. Altitude 3,000 meters. Host: Peromyscus
hylocetes.

Probable records. One female, collected by A. Barrera, December
22, 1951, at La Venta, D.F., Mexico. Altitude 2,850 meters. Host:
Peromyscus truei gratus.

One female, same data, but collected March 29, 1952. Host:
Peromyscus hylocetes.

COMMENTS ON THE GENUS STREPSYLLA

It has been pointed out earlier that fleas of the genus Strepsylla
are apparently widely distributed through much of Mexico, and that
they seem to be characteristic parasites of indigenous mice and
rats. The same statement may apply to Guatemala. It is also
evident that fleas of this genus are apparently more common than
collections indicate. Four of the species are known only in the male
and three of these have been described from single specimens. The
females of only two species are known or have been associated with
males. It is quite likely that fleas of the genus Strepsylla are nest-
inhabiting forms and are less likely to be found on the host than are
other species.

SUMMARY

In this paper, three new species of the genus Strepsylla Traub,
1950, are described and illustrated. Strepsylla dalmati sp. no v.,
from Guatemala (host Peromyscus guatemalensis) , is unique in that
the last segment of the metatarsus has only four pairs of plantar
bristles. S. schmidti sp. nov., from Chiapas, Mexico (host Pero-
myscus boylii levipes), agrees with S. dalmati in that the dorsal
margin of the male immovable process is evenly convex instead of
being sinuate. It is distinguished by the fact that the crochet is
bifurcate, possessing a stout dorsal spur that extends apicad nearly
as far as the ventral portion. S. villai sp. nov., from Tlaxcala,

TRAUB AND BARRERA: NEW SPECIES OF STREPSYLLA 549

Mexico (host: Peromyscus difficilis amplus), has the usual type of
clasper. The species is characterized by the fact that the distal
arm of the ninth sternum is falcate, while the abdominal spiracles
are lanceolate. All the seven known species of Strepsylla are from
Mexico or Guatemala.

LIST OF ABBREVIATIONS

A.A.R. Aedeagal apodemal rod.

A.B. Antepygidial bristle.

AE.A. Aedeagal apodeme.

A.I.T. Armature of inner tube.

AP.S. Apodemal strut of aedeagus.

A.SH. Acetabular shore.

A.S.T. Apical sclerite of inner tube.

B.P.W. Base of wall of aedeagal pouch.

CL. Clasper.

CO.S. Cordate sclerite of aedeagus.

CR. Crochet.

C.S. Crescent sclerite of aedeagus.

D.A.L. Dorsal anal lobe of proctiger.

D.A.9 Dorsal arm of ninth sternum.

D.L. Disto-dorsal lobe of aedeagus.

F. Movable finger or digitoid of clasper.

FL. Semi-membranous flap associated with male ninth sternum.

I.R. Intramural rod of aedeagus.

L.L. Lateral lobe of aedeagus.

L.M. Lateral metanotal area.

LU.S. Lunate structure of aedeagal pouch.

MB. Manubrium.

M.D.L. Median dorsal lobe of aedeagus.

MPM. Mesepimeron.

MPS. Metepisternum.

MSN. Mesonotum.

MTM. Metepimeron.

MTN. Metanotum.

MTS. Metepisternum.

NO. Nose-like extension of side of apex of proximal arm of ninth sternum.

P. Immovable process of clasper.

P. A. 9 Proximal arm of ninth sternum.

PL.A. Pleural arch of metathorax.

P.R. Penis rod.

PS.S. Pseudosetae.

P.W. Wall of aedeagal pouch.

S.D.L. Subapical dorsal lobe of aedeagus.

S.I.T. Sclerotized inner tube of aedeagus.

SQ. Squamulum.

T. Filamentous tuft of subanal sclerite.

V. Vesicle of aedeagus.

V.P. Subanal sclerite.

8S. Eighth sternum.

IT. First tergum.

8T. Eighth tergum.

8T.T. Triangular extension of eighth tergum.

REFERENCES

Traub, Robert

1950. Siphonaptera from Central America and Mexico. A morphological
study of the aedeagus with descriptions of new genera and species. Fieldiana:
Zool., Mem., 1: 1-127, pis. 1-54.

Traub, Robert and Johnson, Phyllis T.

1952. Four new species of fleas from Mexico (Siphonaptera). Amer. Mus.
Nov., no. 1598, pp. 1-28, figs. 1-53.^

550

PLATES

EXPLANATION OF PLATE
Strepsylla dalmati sp. nov.

Fig. 1. Head and prothorax. Fig. 2. Distal arm of ninth sternum.

Fig. 3. Modified abdominal segments, male.

Fieldiana: Zoology, Volume 37

Plate 10

STREPSYLLA DALMAT!

EXPLANATION OF PLATE

Fig. 1. Strepsylla dalmati sp. nov. Meso- and metathorax.

Fig. 2. Strepsylla schmidti sp. nov. Distal arm of ninth sternum.

Fig. 3. Strepsylla villai sp. nov. Distal arm of ninth sternum.

Fig. 4. Strepsylla villai sp. nov. Eighth sternum of male.

Fig. 5. Strepsylla schmidti sp. nov. Eighth sternum of male.

Fieldiana: Zoology, Volume 37

Plate 11

S. DALMATI

S. SCHMIDTI

EXPLANATION OF PLATE
Movable and immovable processes of clasper.

Fig. 1. Strepsylla dalmati sp. nov. Fig. 2. Strepsylla schmidti sp. nov.

Fig. 3. Strepsylla villai sp. nov.

Fieldiana: Zoology, Volume 37

Plate 12

S.VI

EXPLANATION OF PLATE

Fig. 1. Sfrepsylla dalmati sp. nov. Endchamber of aedeagus.

Fig. 2. Strepsylla taluna Traub and Johnson. Endchamber of aedeagus.

Fig. 3. Strepsylla villai sp. nov. Spiracle.

Fig. 4. Strepsylla schmidti sp. nov. Endchamber of aedeagus.

Fig. 5. Strepsylla villai sp. nov. Endchamber of aedeagus.

Fieldiana: Zoology, Volume 37

Plate 13

O.L.t

M.O.L.

S. DALMATI