( S72 ) 



Some specimens which we consider as belonging to this species have a vestigial 

 third row of bristles on the pronotnm. A series of five S <S (and four ? ¥) taken 

 ofi" Epimys medicatus at Nairobi, moreover, proves the bristles on the ninth 

 sternite of the S to be variable in number, particularly the median series. The 

 numbers of teeth in the abdominal combs of these five c?^ are as follows (one side 

 only counted) : 4, 5, 7, 6—4, 4, 4, 1—3, 5, 5, U— 4, 6, 5, 3—4, 5, 4, 2. 



Length (mounted specimens) : S 3'3— 4 mm. ; ? 3-4 — 4-3 mm. 



1 c? and 2 ? ? from Rnmrnti, British East Africa, October 31, 1910, o& Nasilio- 

 delamerei. 



3 c?c? from Rumruti, October 26 and November 8, 1910, off Epimys medicatus. 



2 ? ? from Rumrnti, October 27 and 28, 1911, oS Arcicanthis massaicus. 



1 S and 2 ? ¥ from Rombo, Kilimanjaro, Juue 7 and 21, 1910, off Arvicanthis 

 ardens. 



1 ? from Mntaragwa, Aberdare Mts., March 1 and 14, 1910, off Lophu- 

 romys zena. 



2 ¥ ? from Nairobi, British East Africa, September 16, 1910, off Arvicanthis- 

 spec. 



2 ¥ ¥ from Nairobi, September 12, 1910, off Otomys spec. 



1 ? from Nairobi, September 13, 1910, iM Arvicanthis %'^^q,. 



5 (? c? and 4 ¥ ¥ from Nairobi, September 12, 1910, 6S Ejjimys medicatus. 



2 ¥ ¥ from Nakura, British East Africa, September 20, 1910, off Epimys spec. 

 1 ¥ from Naivasha, British East Africa, September 17, 1910, off Epimys spec. 



1 ¥ from Igembi Hills, British East Africa, February 15, 1911, o& Otomys spec. 



2 ¥ ¥ from Masaka, Uganda, March 27, 1911, off Arvicanthus abyssinicus- 

 rubescens. 



1 S from Masaka, Uganda, Jnly 31, 1911, off Otomys spec. 



1 c? from Kigezi, Uganda, April 2, 1911, oS Arvicanthis ahyssinictis rubescens.. 



2 <?c? and 7 ¥ ¥ from Mbarara, Uganda, April 3, 1911, off Oenomys spec. 

 1 ¥ from Mbarara, Uganda, Jnly 28, 1911, off Oenomys spec. 



1 ¥ from Kagambah, Uganda, July Id, 1911, off Epimys tvalambae pedester. 



1 ¥ from Kagambali, Jnly 14, 191 1, off Lophuromys spec. 



1 ¥ from Kagambah, July 14, 1911, off Busy my s medius. 



1 (? and 1 ¥ from Nalasanji, Uganda, July 8, 1911, oS Lophuromys ansorgei. 



35. Dinopsyllus grypurus sjiec. nov. (text-fig. 38). 



(J. Similar to D. lypusus, but abundantly distinct in the clasping organs^ 

 The eighth abdominal segment is as in D. lypusus. The two bristles which are 

 placed near the ventral apical angle are sometimes close together, occasionally 

 (e.g. in the type-specimen) the space between them is about twice as wide as th& 

 groove of a bristle. The long process F' of the clasper is of nearly even width 

 throughout and, in contradistinction to all the other species, is bent upwards^ 

 The apex of the ninth sternite (text-fig. 38) is more rounded ventrally than in the 

 other forms, and the short bristles placed there are straight and thin, at any 

 rate thinner than in the other species. The number of bristles on the ninth 

 sternite is not constant, being different to some extent even on the right and left, 

 halves of the sternite. There is an apical set of from five to eight, of which 

 two or only one is long, then follows (proximad) a gap with minute bristles^ 

 sometimes interrupted by a single moderately long one (as in fig. 38), and then 



