REVISION OF THE SARCOPSYLLIDAE 57 
species. The hind femur has a lateral row of five or six bristles and hears at the 
dorsal edge eight to ten fine hairs. The tarsal segments are longer than in E.gallinaceus, 
this being especially marked in the fourth segments. The second segment ot the 
fore tarsus is nearly twice as long as it is broad, the fourth segment being only a little 
longer than it is broad. The second segment of the mid tarsus is more than twice as 
long as it is broad, being somewhat longer than the tibia is broad at the apex. The 
fourth hind tarsal segment is about twice as long as it is broad. The fifth segment 
of all the tarsi is quite different from that of every other species, being long and 
rather slender (PI. Ill, Fig. 26). It bears on each side only one heavy bristle placed 
near the base. In one mid tarsus of one of our specimens there is a second bristle 
situated at the basal third on one side only. Between the middle and the apex of this 
tarsal segment there are two fine hairs, and at the apex a long thin hair. On the 
ventral side, at the apex of the segment, there is a pair of rather stout bristles. The 
claw is long and slender, being a little more curved than in E. gallinaceus. The 
measurements of the mid and hind tarsi are as follows : — 
First Segment 
Second Segment 
Third Segment 
Fourth Segment 
Fifth Segment 
Mid tarsus, J ? 
I I 
I 3 
9 
8 
20 
Hind tarsus, J 9 
2 5 
I 5 
9 
20 
Modified Segments. — £. The oblique distal edge of the eighth sternite is emarginate. 
The manubrium of the clasper is slenderer than in E. gallinaceus, and more curved. 
The long flap of the clasper is broader than in that species bearing three bristles at 
the ventral edge (PI. Ill, Fig. 20, P'). The third process of the clasper (F) is rather 
less curved than in E. gallinaceus. 
%. The eighth tergite is sinuate. It bears on the outer side two bristles beneath 
the sinus and a row of four above it, the uppermost bristle being short. On the 
inner side there is a row of three bristles, with some minute hairs in addition, most of 
these hairs being pLced between the most ventral bristle and the one next to it. The 
stylet is about three times as long as it is broad, being bottle-shaped. The anal tergite 
bears a pair of heavy bristles which are about half as long again as the stylet. 
Length: f, 1-4 mm., r8 mm. 
We have a long series of both sexes from Mt. Anderson, West Australia, taken 
off Echidna aculeata by C. J. Tunney in November 1901. The species occurs also 
in India, where Captain Windsor found some %% on rats at Agra in February 1904. 
