730 PROCEEDINGS OF THE .XATIONAL MUSEUM. vouxxi. 



Sterna sparsely hirsute. 



I'rocess of the sternum of the sixtli segment somewhat quadrate in 

 l)Osterior view, narrower at base, then broader, then narrowed again to 

 a rnucronate apex. The apical faces hirsute witli very long hairs. Pos- 

 teriorly the i)rocess, and the sternum below it, is mediauly deeply 

 canaH(;ulate; antically the process is straight, with tine, raised latenil 

 margins. 



Sternum of the fifteenth segment with the i)roc('ss naked, l)ro;i(lly 

 ensiforrii, mcdianly grooved below. The process consists of an ext<'n 

 sion of the transverse ridge between the anterior pair of legs, and is 

 directed cephalad into a depression between the posterior legs of the 

 fourteenth segment, lietween the ])osteri()r legs of the fifteenth seg 

 ment is also a similar depression, but smaller, silthongh tiie sixteentii 

 sternum is in no way modified. 



Legs of males hirsute with long bristles, especially on the distal 

 joints. Tubercles confined to tiie ventral fa(;e and best developed on 

 the fifth Joint; on the i)osterior legs the tubercles of the other Joints 

 are small or rudimentary. Posterior legs more slender than the others, 

 but not much shorter. 



First legs of males with the sole less developed ami the chiw larger 

 than on the five following legs. 



Male genitalia (Platie LX, figs. \<'-\i). 



Color in alcohol varying from dirty yellowish-white (bone color) to 

 dark pnr]>lish brown. The carina- are always light, and the posterioi' 

 margin of tlie posterior subsegment usually so, also the anterior sub 

 segments, excepting a dark median line and a line on each side along 

 the level of tin', (carina'. Posterior subsegments bordered ail around 

 with a fine margin of distinct brown. Legs and antenine reddish- 

 brown, especially the distal joints. First segment usually with a broad 

 margin of light coh)r all aronnd. 



Length, (jr* miti.; width, 13 mm. 



Type. — LI. S. National Museum collection. I^^onr mature males. 



Locality. — Tana River, East Africa, between the coast and ILimeye. 



One aspect of the male genitalium of this species greatly resembles 

 that of EnrydesmuH la.ius Gerstiicker, as figured by Karsch, and the 

 first inclination was to identify it with that species in spite of consider- 

 able discrepancies in Gerstiicker's description. These are, however, 

 too grave to be reasonably ignored. Compared with most Polydes- 

 moidea, the animal would be called very robust, instead of slender. 

 Gerstiicker's measurements, however. Justify his statement. Neither is 

 it loosely articinlated nor slightly convex. The aj)ex of th(^ i)rocess of 

 the sixth segment of the male is not a distinct knob, and the shape of 

 the process does not suggest a spherical triangle. The ])rocess of the 

 fifteenth segment is not on the "fourth from the last" pair of legs, 

 but the eighth from the last, though in this respect it would not be 

 surprising if a mistake has beeu made in the description. 



