( 530 ) 



1 (J from Niilasanji, Uganda, July 6, 1911, off Oenomj/s spec. 

 1 S and 1 ? from Kigezi, Uganda, April 12, 1911, off Are/caiM/s abi/ssinicus 

 riibescens. 



1 ? from Naivasha, British East Africa, September 17, 1911, off the same host. 



9. Xenopsylla niloticus Jord. & Roths. (1908) (text-figs. 1 and 2). 



Loemn/>s)/Uii nilni'n-iix Jordan and R )ths(;hild, Parusitologii i. p. 50. no, 1"2. t. 5. fig. 3(1008) (Upper 

 Egypt and Sudan). 



The present series of specimens has drawn our attention to a rather striking 

 distinction of this species which we did not mention in our original description. 

 The eye of X niloticus (text-fig. 1) is much smaller than in the allied species, even 

 being vestigial on one side of the head in one of the specimens obtained by 

 Mr. Kemp. 



The genitalia of the S S appear to vary to some extent. The '' finger " 

 is so much longer in one of the specimens than in the others that we thought 

 at the first the individual belonged to a distinct species. Bat as the specimen, 

 in other respects, has all the characteristics of X niloticus, we are inclined to 



Fig. 1. — Head of Xenopsylla niloticus ^J. FiG. 2. — Receptaoulum seminis of .V. %ilo1ieu.i. 



consider it as an abnormal individual. The ninth abdominal sternite of the S also 

 varies, being broader at the apex in some examples than in others. 



The receptaculum seminis has a very characteristic shape (text-fig. 2, taken, 

 like fig. 1, from a Sudanese specimen,\ 



A series of both sexes from : 



Voi, British East Africa, April li> and IS, 1910, off Tatera tnombasae and 

 Tatera iiiyricaiida. 



Kilimanjarc), May 12 to 16, 1910, off Tatera niyricaada. 



Mt. Kenia, December 6, 1910, off Oenomijs bacchante. 



Nyama Nyango, Eusso Nyiro, February 3, 1911, oft' Tatera 7iigricau(la ni/ama. 



10. Xenopsylla isidis Uoths. (1903). 



Puhr. isidi.s Rothschild, Nur. Zoul. .x. p. :iI3. no. 2. t. 5. fig, 2. 5. G 8 (190.3) (Harar). 

 LoemnjjHi/lla itidis, .Jordan & Rothschild, PamsUologi/ i. p. oG. no. IG. t, 2, fig. IG, t. 4. fig. U, t. G. 



fig. 3 (1908). 

 Xenopsylla iaidis, lid., Nov. Zunt . .wiii, p. G.5, no. 7 (1 91 1), 



4 Jd" and 4 ? ? from Mt. Elgon, British East Africa, off Procavia (faemon. 

 This is a new locality for the species. 



