104 EAST AFRICAN POLTDESMOIBEA— COOK. voi. xviii. 



obliquely ventro-cephalad. On posterior segments these processes 

 nearly disajjpear, the tubercles being smaller and smaller and confined 

 to a row along" each margin, the posterior row extending nearly up to 

 the carina. 



Anterior subsegments apparently smoom, but not shining; very 

 minutely punctate-coriaceous, with occasional indistinct longitudinal 

 strife. 



Supplementary margin rather long, especially on middle segments, 

 rather firm, faintly striate, not pectinate. 



Last segment above anteriorly like the anterior subsegments, the 

 projecting posterior portion separated by a gentle transverse depres- 

 sion or constriction, densely rugose, with eight well-pronounced tuber- 

 cles, two on the upper surface and three along the margin on each side 

 of the apex. The dorsal tubercles nearly on a transverse line between 

 the posterior pair of marginal. The posterior pair of marginal tuber- 

 cles directed somewhat upward. The apex itself is truncate, minutely 

 four-dentate, or rather notched in the middle, and with a piliferous 

 punctation on either side. A pair of subapical punctations somewhat 

 farther apart than the apical, as in the species of Oxydesmus. On each 

 side, below the level of the carinie, two large, conic, setigerous tubercles, 

 the superior larger, appearing like a carina to the last segment. 



Anal Aalves moderately convex, with moderately elevated, bat not 

 compressed margins; the superior setigerous tubercle located on the 

 margin about five-sixths of the way to the top; inferior tubercle rather 

 distant from the margin about half way up. Surface of the valves 

 irregularly or subvertically rugose, especially in the more dei^ressed 

 portions. 



Preanal scale broadly triangular, thickened, with a prominent conic 

 tubercle on each side, near the rounded apex, and not exceeding it. 

 Surface very finely rugulose. 



Sterna smooth and shining, only impressed between the legs of either 

 side. 



Color in alcohol dark vinous red, alternating with obscure pinkish. 

 Head very dark vinous, nearly black, a spot above the antenna, and 

 the labral region yellowish. Anterior segments somewhat lighter than 

 the head, the carin;e and posterior crests reddish and yellowish. These 

 median lighter spots become gradually broader, until near the middle of 

 the body they unite with the yellow of the carinae, so that the posterior 

 subsegment is yellow, irregularly infused, and stained with various 

 shades of vinous along its anterior margin, and esjjecially at the base of 

 the carinte. The carinse also have a very narrow margin of vinous not 

 so dark as that of the dorsum; anterior subsegments uniformly dark 

 vinous. Posterior segments merely reddish, darker than the middle. 

 Posterior half of last segment red. Anal valves very dark, preanal scale 

 somewhat lighter, ventral surface and legs vinous-red, lighter than 

 above. 



