( 5"0 ) 



sternite being produced and bearing two long bristles placed close together 

 (text-fig. 35). The process F' of the clasper, moreover, is a little less widened in 

 the centre than in /'. longifroiis. The ninth sternite (IX. st.) is strongl}' ronnded 

 dorsally at the ape.x and very slender iu the centre. It bears about six small 

 and slender bristles in the pro.ximal two-fifths, no bristles in the central fifth, and 

 a slightly variable comb of stiff bristles in the apical third, gither two (type) or 

 three uf the bristles of this comb being as long as the sclerite is broad at the widest 

 jioint of the dilated ape.x. 



The distances of the oral frontal corner from the tip of the ventral spine of the 

 geual comb on the one hand and from the centre of the vestigial frontal tubercle on 

 the other are 66 and 100 respectively. The mesonotum has six rows of bristles 

 (the anterior rows being irregnlar) and the metanotum five or six rows. The 

 mesopleura bear sixteen to eighteen bristles, the metepimerum nineteen to twenty- 

 two, the first abdominal sternite five to seven, the seventh sternite (on the two 

 sides together) a row of eight, and seventeen to twenty additional smaller bristles, 

 and the eighth sternite about forty-two bristles. One of the specimens has only one 

 apical spine on each of tlie abdominal segments II, III, and IV, while other examples 

 have several spines — e.g. the type bears on one side 3, 3, 4, 1 spines, and on the 

 other 2, 3, 5, 1. 



One of the S S (see below) is accompanied by two ? ? ; these three specimens, 

 being taken off the same individual of the host, are, presumably, one species. The 

 two ? ? agree in most details with one another, but do not present any marked 

 difference from ? ? obtained in other localities and on other hosts, and belonging 

 to some other species — e.g. D. l>/pusiis. The number of bristles on some of the 

 segments are as follows : The mesopleura have seventeen or nineteen bristles, the 

 metepimerum twenty-four or twenty-five, the first abdominal sternite fifteen or 

 sixteen, the seventh tergite a row of twelve and twenty small additional bristles on 

 the two sides together in both specimens, the seventh sternite a row of sixteen and 

 forty-six additional bristles, also in both examples, and the eighth tergite twenty- 

 nine or thirty-five bristles below the stigma. There are three abdominal combs, 

 consisting of 3, 4, 4 and 3, 4, 5 spines. 



Length (mounted specimens) : cJ 3 — 3'5 mm. ; ? 35 mm. 



1 c? and 2 ? ? from Mt. Kenia, British East Africa, December 25, 1910. 



1 c? from Mt. Kenia, British East Africa, December 13, 1910, oS Epim'/.sjac/tsoni. 



1 r? from Mt. Kenia, British East Africa, January 2, 1911, ott' the same host. 



1 <J from Kigezi, Uganda, April 28, 1911, oft' Lophuromys spec. ; — type. 



1 3 from Mt. Kenia, British East Africa, January 3, 1911, off Ileliosciwus teniae. 



34. Dinopsyllus lypusus spec. nov. (text-figs. 36 and 37). 



Evidently the commonest species of the genus in British East Africa and 

 Uganda. 



cJ. Tiie ventral apical angle of the eighth abdominal sternite (text-fig. 36) is 

 strongly ronnded off, not being produced as in B. apistus, and bears two bristles, 

 the space between which is about twice as wide as the groove of a bristle. 

 Proximally to these bristles there is a very Iqng one, as shown in the figure. The 

 number of bristles on the eighth sternite is sixty odd (on each side). The process 

 F' of the clasi)er is practically the same as in D. npi.itn.i, but the ninth sternite is 

 characterised by bearing an aj)ical row of eight bristles, of which the posterior three 

 are long, a median row of five to eight, and a few thin proximal bristles. 



