THE GTtOUND TJEETLKS. Ki,'! 



KEY TO INDIANA GENEKA OF CHL.ENIINI. 



/. Punctures of eighth stria of elytra distant from the margin, the ninth 

 stria very distinct; eyes regular in outline, not truncate behind ; culm 1 

 mostly green or bine-black. 

 />. Meutum with a distinct lobe each side; length S or more mm. 



c. Meutum toothed in the center of the notch. LV. CHL.ENU s. 



cc. Meutum not toothed. LVI. ANOMOGLOSSI s. 



bl>. Mentnin without lobes, truncate in front; length 9-9.5 mm. 



LVII. BKACHYLOUL s. 

 mi. Eighth stria of elytra very close to the margin, the ninth indistinct ; 



eyes truncate behind ; color black or piceous. 



<I. All the tarsi pubescent beneath; clypeus with a bristle-bearing punc- 

 ture each side; la bruin with six set;v ; length 9.5-10 mm. 



LVIII. LACHNOCREPIS. 

 (/(/. Hind tarsi not pubescent beneath. 



c. Front tarsi of males with four joints dilated, the first three spongy 

 beneath ; clypeus without bristle-bearing punctures ; labruin with 

 six setae; length 5-6 mm. LIK. ANATRICHIS. 



ee. Front tarsi of male with three joints dilated and spongy; second 

 joint of labial palpi without setse in front: thorax as wide at 

 base as elytra ; length 7.5 or more mm. LX. OODES. 



LV. CHL^ENIUS Bon. 1813. (Gr.. "a cloak or mantle.") 



This genns is composed of greenish- or bluish-black oblong 

 beetles of medium or large size. They are mostly finely pubescent, 

 and when handled give off an odor like that of morocco leather. In 

 a number of species the base of thorax is as wide as that of elytra. 

 They live beneath stones, logs, etc., the majority of the species being 

 found in damp localities, where they feed largely upon other in- 

 sects. In 23 individuals dissected by Dr. Forbes, 83 per cent, of 

 the stomach content was found to be of animal origin. Of this 65 

 per cent, was of insects, chiefly cutworms, canker-worms and other 

 injurious forms, so that the genus ranks high among the beneficial 

 Carabidge. 



About 43 species of Chlsenius are known from the United States. 

 Of these, 16 have been taken in Indiana, while two others perhaps 

 occur. The principal papers treating of the genus are as follows : 



LeConte. "Analytical Table of the Species of Chiasmus in the 

 United States," in. Proc. Phil. Acad. Nat. Sci., VIII, 1856, 25. 



Horn. -"Revision of the Species of Chla?nius in the United 

 States," in Trans. Amer. Ent, Soc.. V, 1876, 253. 



Horn.. "Synoptic Table," in Bull. Brook. Ent. Soc., IV. 

 1882, 3. 



For convenience the Indiana species are first divided into two 

 groups and these in turn into species. 



