379 



a'. With a long stout tail; segments polished and nearly smooth, 5 th 



segment of the leg padded in cT . . Bhynchoproctus proboscideus. 



b 1 . Without a long tail; densely sculptured dorsally; 4 th and 5 th 



segments of legs padded in cf . . . Spirostreptus vittatus. 



b. Ventral grooves long and deep; distance between the eyes about 



equal to or greater than the long diameter of an eye. Thyropygus. 



a 1 . Tail straight , blunt , its apex not upcurled. 



a 3 . Tail short, just surpassing the valves; antennae and legs 



fuscous; segments black not bordered with red. . weberi. 



b\ Tail long, far surpassing valves, legs and antennae yellow, 



segments posteriorly banded with red. . . . pachyurus. 



b*. Tail long, slender, pointed, with distinctly upcurled apex. 



a 4 . Antennae and legs fuscous, flavo-cingulate , the posterior 



border of the segments not red or yellow, with a large 



blood-red lateral spot on each side behind the pore . . . 



erythropleurus. 

 5 4 . Antennae and legs of a uniform colour, not banded; the 

 segments either widely or narrowly banded with red poste- 

 riorly, with no lateral spot. 



a 5 . Legs and antennae entirely fuscous, the segments poste- 

 riorly conspicuously banded with red . . rubro-cinctus 

 b 5 . Legs and antennae yellow (the former sometimes darker 

 at the base: antennae of xanthurus lightly fuscous). 

 a 6 . First segment (in 9) small, laterally angular and 

 without grooves ; the 2 nd and 3 rd segments very large ; 

 the latter with its posterior border mesially emargi- 

 nate dorsally; with a red median dorsal spot upon 

 the posterior half of the segments . . xanthurus. 

 b G . First tergite in 9 wider laterally and sulcate ; 2 nd and 

 3 rd segments smaller. 



a\ The anterior half of the segments dorsally finely 

 punctulate and adorned with a wide flavous patch 

 which spreads on to the posterior half of the 

 segments as a red spot; red border of segments 



very narrow xanthonotus. 



b 7 . Without any pale dorsal band; the transverse 

 bands on the border of the segments wide, the 

 anterior half of the segments at least in the middle 



