438 Mr. R. I. Pocock on East-African Millipedes, 



Species allied to this form occur in tropical East Africa as 

 far to the south as Natal ; but, judging from the form of the 

 copulatory organ, this species is distinct from all that have 

 been hitherto described. 



Tetracentrosternus flavocinctus^ sp. n. (PI. XVIII. fig. 5.) 



Body black, first tergite margined with yellow, the rest 

 with a narrow yellow band running from keel to keel along 

 the hinder border ; posterior half of keels and of tail yellow ; 

 legs and sterna yellow ; antennge black. 



Antennce long and slender, second to fifth segments the 

 longest and subequal, sixth shorter. 



Segments smooth above; keels moderately well developed, 

 with posterior angle dentiform ; the transverse groove on the 

 tergite beginning on segment 5, dying out on segment 15 

 or 16 ; not beaded, nor is the groove separating the two halves 

 of each segment ; the lateral inferior crest strong and 

 crescentic, extending as far back as segment 16; the tracheal 

 tubercles also distinct. 



Legs long and slender; trochanter about twice the length 

 of the coxa and about half that of the femur ; the femur, 

 tarsus, tibia, and patella gradually decreasing in length in 

 the order named. 



Caudal process normal, triangular, with rather widely 

 truncate apex. 



Anal sternite triangular ; the two tubercles moderately 

 large, but not projecting so far as the median apex of the 

 plate. 



Sternal areas in the posterior half of the body furnished 

 with a spiniform process at the base of eacli leg ; these 

 gradually die out on the anterior segments. 



Length 27 millim., width 4'3. 



(J . As in female, but smaller, thinner, with larger keels, 

 and little broader yellow stripes ; a broad median erect process 

 on the sternum of the fifth segment. 



Legs unmodified (the pair of the seventh segment absent) ; 

 tarsi of tliose at the anterior end of the body padded with 

 hairs below. 



Copulatory feet as in figure. 



Loc. Leikipia (?); Ngatana (c?). A single example 

 obtained at each spot. 



I refer this species provisionally to Tetracentrosternus on 

 the strength of the spine-armature of the sterna. It differs 

 from the type of the genus, subspinosus, from Burma, in being 

 stouter, in the form of the copulatory organ, as well as in 



