( 558 ) 



the internal vertical arm is very broad, the arm itself slender, and the horizontal 

 arm again broad. Tbis latter portion of the boomerang-sliaped segment is not 

 acuminate, as in the allied s(.ecies, but truncate, with the upper angle rounded and 

 the lower angle about 85°. Tlie apex is but feebly chitinised, and bears a row of 

 short slender bristles (about a dozen), there beiug no bristles farther proximally on 

 the sides and along the ventral margin. The segment, moreover, is clothed at the 

 almost membranous apex with exceedingly minute hairs not indicated in the figure. 



? . The seveutli sternite (text- fig. i!8) lias a very broad siauate upper lobe, the 



lower angle of which is produced into a narrow process of variable length. The 

 segment bears a row of from five to seven long and strong bristles on each side and 

 six to eight additional bristles in front of the row. The eighth tergite is strongly 

 rounded, and is further characterised by the position of the bristles, none of which 

 are placed at the apical edge. There is a subventral row of five or six bristles on 

 this segment, which are all stout, sometimes with the exception of the first ; above 

 this row there is one long and thick bristle and two to four smaller ones. On the 

 inside the segment bears one or two minute bristles. The stylet is three times as 

 long as it is broad at the base. The anal sternite has seven or eight bristles on the 

 two sides together. The head of the receptaculum seminis (H.S.) is somewhat longer 

 than the tail. 



Length imounted specimens) : (S 2-3 mm., ? 2-4 — 3 mm. 



1 (J and 3 ? ? from Igembi Hills, British East Africa, February 15 and 16, 

 1911, off Lophuromys zena. 



1 S and It ? ? from Aberdare Mts., British East Africa, February 17-21, 1910, 

 off Lophuromys sena ; — type. 



1 (? from Mt. Kinangop, Aberdare Mts., February 27, 1910, off Dendromi/s 

 insignis. 



1 ? from Mt. Kinangop, February 25, 1910, off Oenorni/s bacchante. 



1 S from Mutaragwa, Aberdare Mts., March 13, 1910, off Graphiurtis microtis 

 satwatv.s. 



1 S and 4 ? ? from Mutaragwa, March 13, 1910, o^ Epimi/s jnchsoni. 



4 (J cJ and 3 ? ? from Mutaragwa, Aberdare Mts., March 1-14, 1910, off 

 Lophuromys ze.na. 



1 ? from Mt. Kenia, December 7, 1910, off Otomys irroratus elgonis. 



3 cl' (J from Mt, Kenia, December 8, 1910, off Loplnnomys zena. 



1 ? from Mt. Kenia, December 10, 19111, oS Epimysjacksoni. 



1 ? from Mt. Kenia, January 3, 1911, off Epimysjacksoni. 



2 S S and 3 ? S from Mt. Keuia, January 3, 1911, off Thamnomys spec. 

 1 ? from Mt. Kenia, December 12, 1911, off Epiniys meili'-atus. 



1 ? from Mt. Kenia, i^S Lophuromys zena. 



29. Ctenophthalmus eximius spec. nov. (text-figs. 29 and 30). 



6 ?. Allied to Ct. cnphiincs, but at once distinguished from it by the fifth 

 hindtarsal segment bearing only three jiairs of lateral liristles (besides an anterior 

 ventral pair), by the ? having four antepygidial bristles instead of three, and by the 

 modified abdominal segments being different. 



Head. — The spines of the genal comb are all three sliarply pointed. The genal 

 process is broader than in Ct. copharus, being half as broad again as tlie second 

 genal sjiine in tlie cj, and nearly twice as broad as that spine in the ? . 



