56 THOMPSON YATES AND JOHNSTON LABORATORIES REPORT 
hinder edge of the occiput is not produced into a distinct lobe as in that species, the 
lobe being vestigial. The maxilla is a little slenderer than in E. gallinaceus. 
Thorax. — The pro- and mesothorax bear each two long bristles, and further 
upwards two more small ones. The epimerum of the metathorax has a row of four 
bristles, there being in one specimen one additional bristle in front of the stigma. 
Abdomen. — The tergites bear one bristle on each side, the seventh tergite pos- 
sessing an additional bristle near the apex. The stigmatical cavities are rather larger 
than in E. gallinaceus. There is apparently no bristle on the seventh sternite. 
Legs. — The hind femur, which bears a row of bristles in most specimens of E. 
gallinaceus, has on the inner side one or two bristles near the base and another near the 
apex. The tarsi, with the exception of one midtarsus, are absent in two specimens 
we have seen, the claw of which is, however, also broken off. The fifth segment of 
this midtarsus resembles that of E. gallinaceus, but the fourth lateral bristle is a 
little heavier, and there is only one apical ventral bristle, as is the case in E. ambulans. 
Modified Segments. — The eighth tergite and the stylet are essentially as in 
E. gallinaceus. 
Dr. Tiraboschi described this insect from specimens caught on rats in Italy. 
The specimens are most frequently found on the head of the host. 
8. Echidnophaga liopus, spec. nov. 
(PI. I, Fig. 2 ; PI. Ill, Figs. 20, 26) 
Head. — The small hairs on the back of the head are heavier than in E. gallinaceus. 
The frons is more strongly angulate than usually, being more depressed behind the 
angle, the angle bearing at each side a small tooth which points upwards (PI. I, Fig. 2). 
The ventral genal process is longer than in E. gallinaceus, the oral edge being, how- 
ever, shorter than the genal edge measured from the base of that process to the apex 
of the horizontal genal process. The occiput measured dorsally is about two-thirds 
the length of the frons. It bears one bristle above the antennal groove, generally 
accompanied by a small hair. The hinder edge of the occiput is dilated laterally in 
the middle, the lobe being very short and broad. The second segment of the maxillary 
palpus is nearly as long as the fourth, being proportionally longer than in E. gallinaceus. 
Thorax. — The pro- and mesothorax bear each four bristles on each side, while 
there are two or three bristles on the metathoracical epimerum. 
Abdomen. — The tergites two to six have one bristle on each side. The first 
and the seventh tergites, however, possess two. There is, moreover, on the seventh 
tergite a bristle between the middle and the apex of the segment. These bristles are 
slenderer than in E. gallinaceus. The seventh sternite bears one bristle on each side. 
Legs. — There is one short stout bristle posteriorly at the apex of the mid and 
hind coxae. The thin hair usually accompanying these is, however, absent in thie 
