1895. PROCEEDINGS OF THE NATIONAL MUSEUM. 49 



Preanal scale semi elliptic triangular, tricnspidate, the middle pro- 

 jection usually flat and thiu; the others long conic-cylindric papilUe, 

 with a setigerous cavitj' at apex. 



Legs of male larger and stronger than those of female, without 

 special modification for copulatory purposes, except that the claw of 

 the male legs is short and stout; second joint with a short, sharp s]nue 

 at apex below; joints in order of length o. 6, 5, 2=4, 1 ; surface of joints 

 not tuberculate nor papillate in either sex. 



First and second pairs of legs free in both sexes; first jiair much 

 smaller tlian second and succeeding pairs, the two basal joints propor- 

 tionately longer. 



Second pair of legs of male with the coxal joint produced ventrally 

 into a sharp cone, on the median face of which is the opening of the 

 spermatic duct. Genitalia of female internal, protrusible. Genitalia 

 of male apically of two parts, one of which is distally spatulato, trans- 

 versely wrinkled, and with a decurved edge forming a groove which 

 serves as a sheath for the other, styliforra, ramus. Basal joint not 

 expanded; apical joint inserted under the projecting edge of the aper- 

 ture in which the genitalia lie. »Segments of adult, 20. 



Distribution. — The west coast of Tropical Africa. 



OXYDESMUS CAMPII, new species. 



Vertex prominent, granular-rugulose; sulcus very distinct. 



Clypeus medianly in^ominent, nearly smooth or finely striate-rugulose, 

 excavate below the antennre; also a broad, obli(]ue fossa midway be- 

 tween the antenna and the lateral margin. 



First segment somewhat longer and narrower than the second, lat- 

 erally decurved, especially in front; distinctly and broadly emarginate 

 in front on each side of the prominent middle; a fine, smooth, raised 

 margin runs entirely around; submarginal ridge smooth, very ])romi- 

 neut, rather remote from the margin and incurved anteriorly. Surface 

 of segment finely and evenly granular, obliquely rugulose on the 

 anterior lateral portions; medianly in front there is a distinct promi- 

 nent area; behind this a broad depression. Tubercles scarcely evi- 

 dent, areas wanting. Two tubercles representing the anterior row are 

 located on the raised area; the second row is represented by two 

 located considerably behind the middle, while of the third several are 

 evident, the median coalesced with the posterior marginal ridge, the 

 others very near it. 



Subsequent segments gradually broader to the sixth or seventh, 

 thence subequal to the seventeenth; second segment shortest, the 

 others gradually longer to about the sixteenth. Anterior corner 

 gradually less rounded, so that the middle segments have their lateral 

 margins nearly straight, though the anterior corner is never as square 

 as the posterior. Surface distinctly, though finely and evenly, granu- 

 lar, the tubercles gradually more prominent than on the first segment, 

 Proc. N. Mo 95 4 



