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 Jlavocinctus, 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 ; antennae black. 



Antenna? 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 each leg; these 

 gradually die out on the anterior segments. 



Length 27 millim., width 4"3. 



$ . 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 those at the anterior end of the body padded with 

 hairs below. 



Copulatory feet as in figure. 



Loc. Leikipia (?); Ngatana (J). 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 



