254 



[November, 



3. — IscHNOPSYLLus BRACHYSTYLUs, spec. iiov. (Figs. 1 and 2). 

 We have two specimens, which, in general appearance, most nearly 

 resemble I. elongatus. Curt. (1832), but are at once distinguished from 

 both this species and I. Intennedivs, Eothsch. (1898), by the short 



F,g. I 



anal stylet. The two specimens differ considerably in detail. Bvit as 

 they were obtained off the same host on the same day, presumably oft' 

 the same individual of the host, and as in the allied species also there 

 is a great amount of variation in such details, we believe we are 

 justified in treating the two specimens as belonging to one species. 



The head is a little less vouiided than even in /. intermedius. The numbers 

 of spines in the eight combs are in the type 41, 43, 28, 41, 34, 25, 13, and 16, 

 and in the second specimen, 41, 39, 30, 35, 32, 23, 13, and 11. The mesonotum 

 bears in the type a row of aboiit 20 slender spines on the inside before the 

 apical edge, and in the other example 12. There are on the epimeriim of 

 the mesothorax 3 or 4 apical bristles and 4 or 5 lateral ones (2 or 3, 2, 

 3 or 4). The sternites of segments 4 to 6 of the abdomen have a roAV of 

 6 bristles on each side in the type, and of 5 in the second specimen. The 

 seventh sternite bears in the type an elbowed row of 13 bristles on one side 

 and 16 on the other, with six or seven smaller bristles in front of the row, the 

 numbers in the second individual being 11 bristles in the row, and 3 or 4 in 

 front. In shape the seventh sternite resembles that of /. intermedius, being 

 narrower than in I. elongatus. The eighth sternite (Fig. 1) is elongate- 

 triangular in latei'al aspect, differing therein considerably from I. elongatus, 

 but less from I. intermedius. The stylet (Fig. 2) is very short, being much 

 shorter than in any other eight-combed bat-flea. 



The bristles on the first segment of the mid and hind tarsi are longer than 

 in /. elongatus, being practically the same as in J. intermedius. The hind tibia 

 bears 12 or 13 short bristles along the hind edge between the second notch and 

 the apex, the hind tibia having 9 or 10 notches inclusive of the apical one. As 

 in the allied species, only the first and second notches bear a pair of diverging 

 spines. 



