Dr. G. A. K. Marshall on Alcides, SchOnli. 153 



As a matter of fact, A. delta differs from both the other 

 forms mentioned above in a very striking character ; nor- 

 mally in Alcides each tarsal claw is deeply cleft, but in 

 ^. ft'eZ/fl the claws are simple and soldered together at the _ 

 base. This character is also found in yet another new and 

 allied species, likewise from Ceylon. I have not so far 

 observed it elsewhere in the genus, though Lacordaire men- 

 tions its occurrence without citing any species, A. triangu- 

 Ufer presents a somewhat intermediate condition, the inner 

 division of the claw being very much reduced. 



The following table will serve to discriminate the mem- 

 bers of this group, all of which possess a similarly-shaped 

 large patch of silvery-white scales on the side of the meso- 

 and metasternum, and this also occurs in the very differently 

 marked A. kirschi^ Pasc, from Labuan: — 



1 ( 4). Tarsal claws simple, connate at the base ; 



sides of piothorax not constricted in 



front; gense of J not produced do^vn- 



wards at the apex. 

 2(3). Transverse imj)ression at base of elytra 



shallow, base of prothorax not lower 



than the apex ; apical edge of rostrum 



produced into a short 'point in the 



middle deltuy Pasc. 



3(2). Transverse impression on elytra very 



deep, base of prothorax distinctly lower 



than the apex ; apical edge of rostrum 



shallowly emarginate in the middle . . ephippiatm^, sp. n. 



4 ( 1). Tarsal claws cleft ; sides of prothorax 



markedly constricted in front ; geuse 

 of J with a tusk-like downward pro- 

 cess at the apex. 



5 (14). Elytra with a large common triangle 



formed of broad pale stripes enclosing 

 a black triangle ; front tibiae with an 

 internal tooth placed nearly in the 

 middle. 



6(9). Peduncle of submentum narrowly ob- 

 long (2 X 1) and shallowly constricted 

 at the extreme base only ; anterior 

 pale stripe on prothorax running trans- 

 versely upwards along the edge of the 

 granulate area, not covering the post- 

 ocular lobe. 



7 ( 8). Apical margin of rostrum rounded; 

 scutellum pointed at apex ; post-hume- 

 ral stripe on elytra not uniting behind 

 with posterior angle of the pale tri- 

 angle ceramodelta, sp. n. 



8(7). Apical margin of rostrum with a short 

 sharp point in the middle ; scutellum 



