26 Myriapoda of West Africa. 



Fourth and subsequent segments longer, above with a slight transverse 

 furrow across the middle of the posterior subsegment ; furrow disappearing 

 on the seventeenth segment ; posterior segments with a faint median longitu- 

 dinal sulcus ; superior carinas posteriorly pointed, decreasing on the last three 

 segments, those of the nineteenth nearly obsolete. All the segments, except 

 the first and the last four have a rather slight oblique inferior carina located 

 so as to make tlie outline of a cross-section of the posterior subsegment some- 

 what quadrangular ; segments longitudinally wrinkled between the carinse. 



Repugnatorial pores large, circular, located on the lateral face of the carina, 

 and near the posterior margin of the segment. 



Last segment finely roughened, a few bristles on its posterior margin, and one 

 on each side of the base of the smooth, slightly decurved, scarcely attenuated 

 mucro, which is elliptical in cross-section, and bears on its truncate apex four 

 short bristles. Sides of end a little swollen, and the under side of mucro with 

 a shallow groove, so that when held at the proper angle it ajjpears slightly 

 emarginate. 



Anal valves wrinkled above and along the compressed margins ; on each 

 valve near the margin, and at about equal distances from the top and bottom 

 of the valves and from each other, two long bristles. 



Pre-anal scale triangular, obtuse, aboiit as wide as long, with a bristle on 

 each side below the apex. 



First pair of legs 2 mm. long, much shorter than the others ; third joint 

 longest, slightly exceeding the second, which is but little longer than tlie 

 subequal first, fourth, fifth, and sixth; fifth joint in males with a dense hairy 

 fringe along the distal half of its inferior edge ; the sixth joint with such a 

 fringe along nearly the whole of the inferior edge ; surface of all the joints 

 sparsely hirsute. The fringes appear on all the legs to the tenth or twelfth 

 pair, where that of tlie fifth joint is lost ; that of the sixth becomes gradually 

 shorter and disappears before the fourteenth or fifteenth segments. 



Second pair of legs longer than first, 2.8 mm., the comparative length of 

 joints the same. 



Fourth pair of legs of male, and the third or fifth (the specimen was damaged) 

 with the third joint swollen on the lower side, and provided with a truncate 

 conical obliquely directed protuberance open at the end. The opening leads 

 to a flask-shaped cavity containing an irregular homogeneous mass ; in two 

 cases it appeared that there was a tubular passage leading from the cavity 

 upward inside the joint, but in another leg the wall of the cavity appeared 

 very distinctly defined, and no trace of interior connection could be made out. 



Subsequent legs gradually longer, to about 6 mm., moderately hirsute. 



Genitalia of male — see plate I, figs. 1, 2. 



Color of alcoholic specimens from chocolate-brown to nearly black, the 

 labrum, margins of first segment, posterior margin, both carinas, and ventral 

 surface of other segments, mucro, and proximal joints of legs, pale yellow ; 

 antennae brown. The yellow posterior margin of the segments is sometimes 

 obsolete, and the ventral surface and distal portions of the joints of the legs 

 may be pale reddish-brown. 



Length of longest specimen 26 mm. ; diameter of segments 3 mm. 



