NO. 1170. THE FAMILY GOMPUODESMID.E— COOK. 719 



the anterior segments scarcely evident, but more proiioiinced from the 

 fifth back, sligiitly arched, the posterior edge sliglitly more elevated. 

 Marginal ridges of segments 2 to 4, also of G and 8, linear, more pro- 

 nounced than on the first segment. Carina* gradually larger from 

 segment 10; from 14 with evident tooth-like projections beyond the 

 posterior margin. Projection of segment 18 smaller than that of 17, 

 that of 19 small, blunt, papilliform. 



Last segment with a distinct, fine, transverse furrow limiting the 

 posterior caudal projection, Avhich is short triangular, with a blunt, 

 almost truncate, dorsally swollen apex, and has on each side a stout, 

 wartlike knob. Both the knobs and the apex of the segment bear 

 bristles. 



Anal valves light gray, with smooth yellow margins. Preanal scale 

 transversely subhexagonal, with a small median knob between the lat- 

 eral wart-like prominences. 



Second leg of the female with a long styliform process directed 

 obliquely caudad and ventrad, and lying between the legs of the third 

 pair. 



Color in alcohol pale bone-yellow, with a light-brown posterior mar- 

 gin of the dorsal portion of the segments, and Avith more or less evi- 

 dently brown posterior corners of the anterior and posterior cariujTe. 

 Antenna3 and legs light ferruginous. 



Length, 49 mm.; width, 10.5 mm. 



Locality. — One mature female specimen and an immature male, col- 

 lected at Mombassa. 



The male specimen was 31 mm. long and 8 mm. broad, and had 19 

 segments. There was no trace of the button-like process of the coxa 

 of the second leg, which bears the genital opening, nor of the processes 

 of the pedigerous lamina' of the sixth and fourth from the last pairs of 

 legs. In place of the not yet developed genitalia, between the coxa? 

 of the legs of the seventh segment were two transversely quadrate 

 cushion-like prominences. 



Genus SPHENODESMUS Cook. 

 Sphenodesmiia Cook, Proc. U. S. Nat. Miis., 1895, XVIII, p. 83. 



Body rather small, over five times as long as broad ; dorsum moder- 

 ately convex, the moderately broad carina} sloping nearly in the direc- 

 tion of the dorsal arch. 



Antenna' filiform, rather robust, second joint slightly longer than the 

 four following, which are subequal; olfactory cones ten. 



First segment scarcely three times as broad as long, subelliptic, the 

 posterior margin laterally somewhat curved forward. 



Segments evenly convex, distinctly coriaceous rugulose, especially 

 later ad. 



Lateral carinte with marginal callus very prominent, continuous in 

 front, scarcely so behind; on anterior segments the callus is less prom- 



