( 560 ) 



qnite short. The eighth tergite resembles that of Ct. cophunis. It bears a snbventral 

 row of five or six stout bristles, sometimes preceded by a small bristle, and above 

 the row there is one long bristle accompanied by one or two small ones. None of the 

 bristles are placed at the apical margin of the segment. On the inner surface the 



'mi.si 

 Fig. 30. — Ctenophthabyt.m e-rim-ins. 



segment bears three to five small bristles. The receptacnlum seminis is similar to 

 that of Ct. cophvrus, btit somewhat slenderer than in most examples of that species. 



1 (J and 1 ? from Kigezi, Uganda, April 19, 1911, off Lfiyj/^M/'OMf/s .,-(;?(»; — type. 



1 {J and 1 ? from Kigezi, April 15, 1911, o& Lophurotni/s spec. 



1 c? from Lake Mutanda, Uganda, May 9, 1911, oS Lophurom>/s spec. 



2 c?c? and 1 ? from Nalasanji, Uganda, July 6, 1911, off Lophuronn/s spec. 



1 (? and 1 ? from Chaj-a, near Rncbnrn K., Belgian Congo, September 17, 1911, 

 off Lophuromya spec. 



2 ? ? from Muhamba, Lake Kivu, Belgian Congo, May 20, 1911, off 

 Lophuromys spec. 



Key to the species of Ctenophthalmus known from Africa south of the Sahara. 



I. Rostrum reaching to near apex of forecoxa ; longest bristle of second 

 hindtarsal segment extending beyond apex of fourtli segment ; abdominal tergites 

 IL and III. with more than two bristles below the stigma; nietepimerum with more 

 than ten bristles; sculpture of surface of body and limbs very inconspicuous. 



a. S ■ Movable process of clasper abruptly widened distally, the ventral angle 



pointing ventrad ; S without lateral bristles on the basal abdominal 

 sternite ....... Ct. triodouttis Roths. (1907). 



<J. Movable process of clasper not curved down at apex ; the ventral angle 

 pointing distad ; $ with lateral bristles on the basal abdominal sternite 



Ct. aialax spec. nov. 



II. Rostrum hardly extending to ajiical third of forecoxa ; longest bristle of 

 second hindtarsal segment at the most reaching to base of fourth segment ; 

 abdominal tergites with only one bristle below stigma ; metepimerum with less 

 than nine bristles ; metejjisternum narrow ; surface-sculpture distinct. 



b. Fifth hindtarsal segment with four lateral plantar bristles, at least on one 



side of the segment or in one hindtarsus .....'•. 

 This segment with three lateral plantar bristles. Eighth abdominal segment 

 of <J triangular ; ? with four antepygidial bristles. Ct. e.vimius spec. nov. 



