BY THE REV. T. BLACKBURN. 667 



H. Apical part of suture of elytra 

 on either side keel-like, — the 

 apex itself prominent or sub- 

 spiniform longuhcs, Blackb. 



HH. Suture of elytra very slightly 

 convex, — at apex not at 

 all produced or subspini- 

 f orm 



I. Colour of elytra dull brownish 



yellow without any ferru- 

 ginous tone Jlavus, Blackb. 



II. Colour of elytra of a decidedly 



ferruginous tone angustus, Blackb 



GC Hind coxse on external margin 

 scarcely if at all shorter than 

 the distance from their hind 

 margin to the hind margin 

 of the 3rd ventral segment. 



H. Basal joint of hind tarsi evi- 

 dently longer than the 2nd 

 joint sGutatus, Macl. 



HH. Basal joint of hind tarsi not 



longer than the 2nd joint. coUaris, Blackb. 

 FF. Apical membrane of elytra ex- 

 traordinarily developed posticalis^ Blackb. 



EE. General colour not uniform, — 



partly black or pitchy 



F. Upper surface with a velvety 



appearance, and pruinose iridiventris, Blackb. 



FF. Upper surface glabrous (or 



nearly so) and nitid marginatus, Blackb. 



DD. Trilobed outline of head very well 

 developed, with the middle not 



