150 Descriptive Catalogue [1896. 



Synopsis of Genera. 



Mentum with the median tooth sliorter than the lateral lobes ; 

 head with a long neck, narrowed triangularly from behind the eyes 

 towards the base Casnonia. 



Mentum with the median tooth as long as the lateral lobes ; head 

 narrowed behind, but with a shorter neck-like process Stenidia. 



Gen. casnonia, Latreille, 

 Icon. Col. Europ., i., 1822, p. 77. 



Mentum deeply incised, and having a median tooth shorter than 

 the lateral lobes ; ligula ovate, slightly truncate at the tip ; para- 

 glossse very slender, hardly as long as the ligula, and disconnected 

 with it for the greatest part of the length ; last joint of palpi 

 fusiform, acuminate ; mandibles long, projecting, and with a blunt 

 tooth at the base; labrum transverse; head rhomboid, with a short 

 spherical neck ; antennae reaching the base of the elytra, basal joint 

 moderately long, thickened, second joint very short, the others 

 sub-equal ; prothorax much attenuated, subcylindrical in the 

 middle, constricted above the base ; elytra broader than the pro- 

 thorax, sub-parallel, slightly convex, rounded in the posterior 

 angle, and slightly oblique towards the suture ; legs slender ; tarsi 

 long, filiform, with the fourth joint slightly incised ; claws not 

 pectinate. 



Hab. Casnonia is generally met with in damp grassy spots, and 

 is represented in Africa, (Senegal, Abyssinia, Zanzibar mainland), 

 India, Burmah, Hong Kong, Australia, and North and South 

 America. The South African species are very closely allied to one 

 another. 



Synopsis of Species. 



Head smooth. 



Elytra dark metallic green, with a reddish-brown apical patch on 

 each side algoensis. 



Elytra reddish brown, with a broad discoidal dark-green patch 

 narrowed behind dorsalis. 



Elytra reddish brown, with a sutural dark-green band sutuTalis. 



Elytra reddish brown, with a sutural and a lateral dark-green 



f prothorax, with very closely-set punctures amoenula. 



[ prothorax, with punctures not closely set capicola. 



Elytra totally light reddish brown rufopicea. 



Elytra black, with a small, yellow, supra-apical spot on each side. . distincta. 



Head punctulate in the anterior part. 



Elytra dark metallic green, with a posterior reddish-brown patch 

 on each side of the suture nataloisis. 



Casnonia algoensis. 



Head black, with a metallic green tinge, deeply depressed longi- 

 tudinally on each side of the epistome, and with a median crescent- 



