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 Palaeopsylla. 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 dorsal bristles of' the tibiae do not form a regular comb 

 as- in Leptop&ylla 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). 



d 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 fj" than in the Q , 

 and, is only a little longer than the oral edge, the frontal' angle lying about 

 midway between the antenna! 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 J', 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 anteunal 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 

 J', and 16-15-11-13 in the Q. The labial palpus is a little shorter than 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 

 pronotvim, 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 ( cj" , 4 and 5 ; Q , 5 or 6 

 and 6 or 7.) 



