108 EAST AFRICAN POLYDESMOIDEA-COOK. vol. xviii. 



Third segment with the median six tubercles of the last row and the 

 median two of the middle row coalesced into a large, horizontal dentate 

 and fluted process, projecting caudad, and entirely covering the median 

 part of the fourth segment. The lateral tubercles of the process small. 



Fourth segment normal, as far as can be seen under the process (the 

 specimen is dry). 



Eemainder of body resembling 0. mastophorus, but the dorsum less 

 convex and smoother, the tubercles smaller and more broadly conic 5 

 the surface of the areas only faintly granular; marginal teeth usually 

 four instead of six, as in 0. mastophoriis. Anterior marginal tooth larg- 

 est and most prominent. 



Last segment of type with apex injured. 



Length, 40 mm.; width, 6.75 mm. 



ORODESMUS FISCHERI (Karsch). 

 (PI. y, figs. 3,4.) 



Poljidesmns (Oxudesmiis) fixcheri, Karsch, Ber. iiber d. Natiirh. Museum z. Ham- 

 burg, p. 133, 1884. 



Segments 1-3 armed with coarse granules, larger toward the middle, 

 especially tiie two median. 



Segments dorsally divided into three transverse rows of tubercu- 

 liferous areas. 



Lateral carintie with the anterior corners rounded, the lateral margin 

 subdenticulate. 



Male genitalium twisted, forked somewhat above the middle of its 

 length; the inner fork apicallytaintly notched, broad and lamellar; the 

 outer apically notched and terminating in a long, thin, pointed, strongly 

 curved hook. 



Color black, the carinne margined with yellow, each segment with a 

 yellow transverse spot on the middle of the posterior margin; last seg- 

 ment black. On the middle segments the yellow spot covers the four 

 middle a^eas of the two posterior rows. On the anterior segments the 

 spot covers only two adjacent areas; on the first segment only the pos- 

 terior areas, on the second and third segments two from all three rows 

 are yellow. 



Length of adult male, 54 mm. 



Locality. — Massai Land, collected by Dr. Fischer. 



"This beautiful East African species belongs to the same group as 

 effulf/ens, Karsch, also East African, and is to be distinguished from that 

 species by its greater length and proportional breadth. The anterior 

 corners of the carina are rounded in 0. Jischeri, and distinctly pointed 

 in 0. effulgens. Last segment black in 0. Jischeri, yellow in 0. effulgens- 

 While in 0. effulgens the yellow color is continuous from the under side 

 of the carinae over the entire ventral surface, in 0. Jischeri the under 

 side of the cariniB is black, and only the anterior margin is yellowish, 

 as far as the legs extend." (Karsch.) 



