363 



keels anteriorly rounded and posteriorly a little produced, especially 

 that of the fourth. 



Keels of the rest of the segments small, without any anterior angle , 

 the lateral border thickened and the posterior angle prominent and 

 acute but produced beyond the hinder edge of the somite only in about 

 the posterior 5 or 6, of the keel-bearing somites; the keels above 

 the middle of the side. The transverse sulcus beginning on the fifth, 

 well developed. The anterior groove finely but distincly beaded. The 

 upper surface shining but not polished, lightly rugulose. The lateral 

 surface inferiorly finely granular. The inferior keel represented on the 

 2 nd to the 6 th somites by a posteriorly directed, elongate tubercle, 

 large on the second, decreasing posteriorly and small on the sixth. 

 Sternal surfaces normally grooved and not armed with spines. 



Anal sternite elongate, the posterior border truncate and trilobate, 

 the two tubercles being on a level with the middle of the hinder 

 border. Caudal process somewhat compressed , its apex truncate and bifid. 



Legs long, distal segment not thickly hairy; claw well developed 

 and not concealed by hairs. 



Length about 34 mm.; width of 10 th 3.5. 



<?. Much more slender (length 32; width of 10th 2.5), flatter. The 

 process on the fifth sternum long, tongue-shaped, quadrate, directed 

 forwards and downwards. The copulatory feet moderately long, termi- 

 nating distally in a sublaminate process which is strongly curved 

 downwards and inwards and is bifid at the extremity; at the base 

 and on the lower side there are two shorter processes, an external 

 short, slender and pointed and an internal much longer, stouter and 

 more curved. 



The only example from Paningahan , which is a male is with the 

 exception of the black antennae and brown head, entirely testaceous. 

 Those from Manindjau , of which two have been selected for description, 

 are mostly pink-coloured; some, howewer, are paler. All the examples 

 from Padang are of a deeper brownish red. 



58. Strongylosoma semicameum, sp. n. PI. XXII, fig. 5. 

 Sumatra: Manindjau and Singkarah. 

 Allied to St. carneum. 

 Colour; head brown above, flavous below; antennae jet black; ter- 



