( 551 ) 



2 ? ? from Kigezi, Uganda, April 10 and 27, 1911, off rodents. 

 4 cJc? and 4 ? ? from Kumba, Uganda, June 30, 1911, off Otomys spec; — type. 

 1 ? from Masaka, Uganda, March 22, 1911, off Arvicantkis abi/ssiniciis 

 rubescens. 



1 ¥ from Nairobi, British East Africa, September 12, \9U), o& Epimijs spec. 

 1 ? from Igembi Hills, British East Africa, Febrnary 13, 1911. 

 1 ? from Mt. Keuia, December 7, 1910, oW Lophuromys zena. 



We add the description of a new sjiecies collected by Dr. W. J. Ansorge. 



25. Otenophthalmus atomus spec. nov. (text-fig. 22). 



? . Differs from ( 't. a/itsoir/f/ in the shape of the seventh abdominal sternite. 

 This segment, instead of being divided by a narrow and deep sinus into two lobes, 

 bears one large truncate-emarginate lobe, below which the edge of the segment 

 runs obliquely downward and forward, as shown in fig. 22. 



Fig. 22. — Ctenophthalmus atovivs. 



The eighth tergite closely agrees with that of Ct. ansorgei and cabirus. It 

 bears two apical bristles (both broken in our specimen), as in those species, also a 

 ventral row of four, and aliove tiie row one long and four short bristles. 



1 ? from Ndala Tando, Angola, December 18, 1908, off Arvicantkis i-ufms 

 (Dr. W. .J. Ansorge). 



2(i. Ctenophthalmus acanthurus si)ec. nov. (te.xt-figs. 23 and 24). 



cT?. Evidently a near ally of Ct. emjis Roths. (1907), of which only the ? is 

 known. Tlie ? oi acanthurus differs from that of enff/s in the shape of the seventh 

 abdominal sternite and in the longer head of the receptaculum seminis. In the ? ? 

 of lioth species the ventral row of bristles on the eighth tergite terminates with a 

 short bristle, which is placed at the apical margin of the segment. The cS of 

 acanthurus is easily recognised by the nintli sternite bearing a row of short, stout 

 si)ine-like bristles at the ventral margin. 



Ilcntl. — The genal spines are |ioint('d. Tlie genal process is nearly twice as 

 broad as the second genal sjiine. 



