( 545 ) 



1 ? from Mntaragwa, Aberdare Mts., British East Africa, March 13, 1910, off 

 G-raphiwHS miootis saturatus. 



1 ? from Mutaragwa, March 24, 1910, oS Dendromi/s niqrifrons. 



2 <?<? from Mutaragwa, March 4, 1910, oS Epimi/s jacksoni. 

 1 ? from Mt. Keuia, December 1910, oW Lopfiarom'/s spec. 



1 (J and 2 ? ? from Mt. Kenia, December 1910, off E/jt'mi/s medicatus. 



1 ? from Bit. Kenia, December 1910, off Arvicanthis spec. 



1 c? from Mt. Kenia, December 1910, off Otomt/s irroratus elqonis. 



1 <S from Kiiimandjaro, May 13, 1910. 



1 ? from Kigezi, Uganda, April 9, 1911, off Lopha-omi/s spec. 



2 S ? from Kigezi, April 25, 1911, off Armcantkis spec. 

 1 ? from Kigezi, April 26, 1911, off Lophiiromys spec. 



Ctenophthalmus Kolen. (1856). 



The genus appears to be very abundantly represented in Africa south of the 

 Sahara. The species from tropical Africa, however, though undoubtedly closely 

 related to some of the Palaearctic forms, do not exactly conform to the generic 

 diagnosis based on the Enropean species. The number of plantar bristles present 

 on the fifth segment of the hindtarsus is generally considered of taxonomic value 

 in Ctenophthalmas and allied genera, being quite constant in the European species. 

 The Ethiopian Ctenophthalmus, however, prove that one must not lay too much 

 stress on a single character of this kind. Only one of the nine species of 

 Ctenophthalmus from tropical Africa ha-* three pairs of lateral bristles on that 

 tarsal segment, as in all the European species, the other forms bearing three bristles 

 on one side of the segment and four on the other, or four on both sides, or three 

 pairs on one hindtarsus and three and a half pairs on the other, the numbers 

 fluctuating within the same species and sometimes being different on the right and 

 left hindtarsus of the same individual. The Enropean Ctenophthalmus, with the 

 exception of Ct. rettigi Roths. (1908), moreover, are characterised by bearing a 

 curved hair at the tip of the labial palpi, which is not the case in any tropical 

 African form. All of them, however, have the three genal spines typical of this 

 genus, a pointed frontal tubercle situated in a groove, a vestigial eye, two rows of 

 bristles ou the frons, a short pronotum bearing one row of bristles, etc. The hiud- 

 coxa has no patch or row of spines on the inside, and the fifth segment of all the 

 tarsi bears a ventral proximal pair of bristles in between the first lateral pair. 



Four species of Ctcnophlhulmus have been described from Africa south of 

 the Sahara: calceatus Waterst. (1912), ansoryei Roths. (1907), enyis Roths. (1907), 

 and triodontUs Roths. (1907). " Typhlopsylla" ingens Roths. (1900), as pointed 

 ont on p. 562 of the present pajjer, does not belong to the genus Ctenophthalmus. 



A. Proboscis reaching close to ajjcx of forecoxa ; three or four bristles beneath 

 stigma on abdominal tergites II and III ; longest apical bristle of second hind- 

 tarsal segment reaching beyond apex of fourth segment ; surface-sculpture faint, 



purtiiularly weak on the legs ; metepimerum with more than ten bristles. These 



cliariicluristics sharjjly distinguish Cl. triodontUH and a nearly allied new species 

 from all the other African ones. 



