58 THOMPSON YATES AND JOHNSTON LABORATORIES REPORT 
2. Genus. HECTOPSYLLA 
Hectopsylla Frauenfeld, Siiz. Ber. K. Ak. Wiss. Wien, Math. Nat. CI. XL. p. 462 (i860), 
Rhynchopsyllus Haixer, Archiv. Naturg. XLVI. p. 72 (1880) (type : pukx). 
Rhynchopsylla, Taschenberg, Die Flohe p. 56 (1880). 
$, %. Frons rounded or angulate ; no hoseshoe-shaped depression behind the 
angle. No internal incrassation of the skeleton from the base of the antennal groove 
upwards to the mesial line of the head, but a dorsal incrassation between frontal oral 
corner and antennal groove. Two bristles on the frons, with a minute hair in 
between ; the upper bristle placed a little higher than in Echidnophaga, the lower 
bristle often minute. Hinder edge of occiput strongly slanting. 
Eye well separate from the antennal groove. Posterior genal process long, 
separating the prosternite more or less completely from the antennal groove. 
Second segment of the antenna with one long and several short bristles on the 
obtuse apical projection. No hairs on non-segmented side of club of antenna ; club 
a little longer than in the other two genera. 
Labium and labial palpi separated by a joint (suture). 
Mandible of $ slenderer than that of % ; serration less far extended basad. 
Mesosternite produced posteriorly into a rather prominent obtuse lobe. One 
small bristle on metathoracic sternum, and a still smaller one on the episternum, 
epimerum vertical, very much higher than long. 
Abdominal segments well separated in swollen Middle tergites without bristles 
either in both sexes, or in the $ only ; the other tergites with at least one subdorsal 
bristle ; no apical bristle on the seventh tergite. Sensory plate of ninth tergite with 
a patch of eight grooves on each side (PI. I, Fig. 9, ic, 11). 
Bristles on fore coxa few in number. Posterior ( = meral) portion of hind coxa 
gradually becoming narrower apically. Hind coxa truncate at apex ; no patch of 
spines on the inner side ; no bristle on the posterior apical lobe. Trochanter and 
femur of hind leg (PI. 1, Fig. 6) each produced anteriorly into a tooth ; the tooth 
of the femur large. A pair of hairs at the subbasal sinus of the hind femur. Last 
abdominal stigma not hairy. 
$. Eighth abdominal tergite without manubrium, the sternite very large, deeply 
sinuate (PI. II, Fig. 16, 17). Gasper widened frontally, being wider than the dorsal 
portion of the ninth tergite, which is situated behind the sensory plate ; a small 
manubrium (M 1 ) projecting downwards from the ventral anterior angle of the dilated 
part, there being a second small manubrium (M 1 ) at the dorsal angle projecting upward ; 
clasper almost completely separated by a suture from the dorsal portion of the 
segment ; three free processes on clasper, the second and third forming a pair of 
pincers. Ninth sternite ' boomerang '-shaped ; the ventral, longitudinal, portion 
projecting beyond the eighth sternite, wider than in Echidnophaga, consisting of 
several lobes ; the internal vertical portion reduced. 
