270 HON. N. CHARLES ROTHSCHILD—ON A NEW GENUS 
Moreover, the abdomen is convex above in both sexes, being less slender than in 
Leptopsylla and Palacopsylla, The stigmata are unusually large, especially that 
of the eighth abdominal segment. There is only one long antepygidial bristle on 
each side, accompanied by two minute hairs. The hind coxa bears a small comb 
on the inside. The short dorsai bristles of the tibiae do not form a regular comb 
as in Leptopsylla musculi, The fifth segment bears in all the tarsi four pairs 
of lateral bristles. There is a distinct eye at the base of the first genal spine. 
Chimaeropsylla potis, sp. nov. (fig. 1). 
3S Q. A fairly dark brown species. The bristles are rather short and those 
placed on the head and thorax are approximately thicker than is usual in the 
allied fleas. 
Head.—The frons is evenly rounded, more strongly in the ¢ than in the Q, 
and is only a little longer than the oral edge, the frontal angle lying about 
midway between the antennal groove and the ventral spine of the genal comb. 
The sides of the frons are flat, this part of the head being strongly compressed. 
There is one long bristle near the frontal corner, a shorter one in front of the 
eye, and one more behind the eye, there being a number of additional small 
bristles as shewn in the figure. The genal comb is vertical and consists of 
6 spines, of which the second and the last are pointed in the 3, while all have 
rounded tips in the Q. The dorsal wall of the occiput is very strongly chitinised, 
this incrassation extending well downwards along the antennal groove. The 
occiput bears three rows of stout bristles, there being also a row of 4 or 5 small 
bristles along the antennal groove. The first segment of the maxillary palpus 
is the largest, the measurements of the 4 segments being 15- 14-10-14 in the 
3, and 16-15-11-13 in the 9. The labial palpus is a little shorter thar the 
maxillary palpus and consists of three segments. The long first segment shews 
near its centre a trace of a division into two, but there is no hair at this place, as 
is usually the case at the apices of the segments of labial palpi. The tip of the 
labial palpus is obliquely truncate as in Pulex and its allies, and bears three 
small bristles. The mandible is proximally as broad as the apex of the first 
segment of the maxillary palpus. The bristles of the second segment of the 
antenna are all short. The eye is black and glossy, and is placed at the base 
of the uppermost spine of the genal comb. 
Thorax.—The pronotum is dorsally only half as long as ventrally. It bears 
a row of ten bristles on the two sides together, and a comb of 12 spines. The 
dorsal spines of the comb are nearly as long as the ventral portion of the 
pronotum, while the lateral spines are quite short. The mesonotum is shorter 
than the occiput, and bears a row of ten bristles on the two sides together, and 
in front of this row about 10 short ones, besides a number of short dorsal 
bristles. There are on each side of the mesonotum, on the inner surface before 
the apex, a ventral spine and a dorsal one. The mesopleura have five small 
bristles. The metanotum is about as long as the occiput, and has a median row 
of short bristles and a postmedian row of long ones, each row containing ten 
on the two sides together. ‘The metepisternum and the metasternum bear each 
one stout bristle, while the epimerum has two rows (¢,4 and 5; Q, 5 or6 
and 6 or 7.) 
