436 ]Mr. R. I. Pocock on fiew 



Copulatory organ long, curved, ending in two sliort 

 subequal prongs. 



Differing from AcantJiodesmus and allied genera by the 

 large size of the keels of the second and third segments, 

 especially of the second. 



Eurydirorhachis diditensis, sp. n. (Fig. 10, p. 441.) 



Colour black, the lateral margin and anterior and posterior 

 angles of the keels ochre-yellow, but only at the hinder end 

 of the body does the yellow extend inwards and involve the 

 pore ; first tergite and caudal process scarcely noticeably 

 yellow ; antennee blackish ; legs fulvo-fuscous, with paler 

 basal segments. 



Dorsal surface of segments coarsely granular on anterior 

 half of body, less coarsely posteriorly, but the rows of tubercles 

 distinct on all of them ; margins of the keels indistinctly four 

 or five lobate ; the posterior border basally indistinctly 

 angulate. Pores situated about two or three diameters from 

 the lateral border, but farther away from it in the posterior 

 than in the anterior half of the body. 



Copulatory feet as in fig. 10 ; distal segment thick and hairy 

 at base, then suddenly narrowed and running out into a long 

 strongly arched smooth ramus, curved upwards and backwards 

 and ending in two short subequal prongs. 



Measurements in millimetres. — ?. Total length 83; width 

 of fifth segment 15, of second 13'6. 



Loc. Mount Dulit, N. Borneo (C Hose). 



Eurydirorhachis baramensis^ sp. n, 



5 . — Resembling the preceding, but with the keels more 

 flavous, the yellow even in the anterior half of the body 

 extending as far as the pore, while the first tergite has its 

 side margins very distinctly flavous and nearly the whole of 

 the caudal process is palej the legs and antennae also are 

 paler. Keels a little larger. 



Measurements in millimetres. — Total length 82 ; width of 

 fifth segment 15*5, of second 13*5. 



Loc. Barara, N. Borneo (C. Flose). 



Eurydirorhachis discrepans^ sp. n. (Fig. 11.) 



^, — Colour (dry) a uniform chocolate-brown, the yellow 

 on the keels (if any) being not distinctly indicated except on 

 the first segment, where it is very visible. Closely related 

 to the preceding species, but with the side margins of the 

 keels much more distinctly lobulate, the lobules on the poste- 



