188 On Millipedes from N. Somaliland. 



On the rest of the segments the posterior portion is elevated ; 

 the transverse sulcus distinct, area in front of it finely ridged 

 transversely, and, like the posterior part, densely punctu- 

 laie ; the lateral longitudinal crests reaching as high as the 

 pore ; pores small, separated by at least two diameters from 

 the sulcus. 



Sterna smooth. 



Anal tergite coriaceous, short, its posterior border nearly 

 transverse, only slightly angled ; valves slightly surpassing 

 it, marginally compressed ; sternite semicircular, only sub- 

 triangular. 



Legs, except the first and second pairs, with fouvtli and 

 fifth segments padded, the pads produced at the distal extre- 

 mity so as to overlap the end of the next segment. 



Copulatory organ as in fig. 5 ; the shorter spiniform branch 

 of the flagellum armed towards its apex with about half a 

 dozen sharp teeth. 



Number of segments 68. 



Length about 130 millim., width 14. 



Four male examples. 



Archispirostreptus niqricolor^ sp. n. 

 (PI. XI. fig. 6.) 



5 . Like the preceding species, entirely black in body, 

 head, and limbs, but with an infusion of deep probably blood- 

 red on the anterior portion of the anal segment, and on the 

 inferior portions of the face and the anterior covered portions 

 of the segments not so widely pale-coloured. 



Head smooth, only finely striolate. Eyes composed of 

 about 60 ocelli, which are arranged in twelve vertical rows. 

 Antennce longer than the face by the length of the sixth and 

 seventh segments ; the upper edge of the segments more 

 convex than in the preceding species. 



Collum or Jirst tergite finely punctulate ; its lateral portion 

 crossed by two grooves or ridges, one close to the lower edge, 

 the other higher. On the rest of the segments the posterior 

 portion is scarcely elevated, the transverse sulcus being weak, 

 the area behind it densely and finely sculptured with fine 

 striolse ; the area in front of it similarly sculptured in its 

 posterior half, transversely crested in front ; the longitudinal 

 grooves strong on the anterior segments, just falling short of 

 the pore, weaker on the posterior and scarcely extending so 

 high. Pores separated by nearly three diameters from the 

 transverse groove. 



