iilJ- lu:uL_\U JiKETLKS. 163 



KEY TO IXDIAXA GEXEEA OF ClIIuEKlINl. 



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

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

 mostly green or blue-black. 

 I. ilentum wath a distinct lobe each side; length S or more mm. 



e. .Mentum toothed in the center of the notch. LV. Chl.e.nils. 



cc. Mentum not toothed. LVI. Anomoglussls. 



bh. Mentum without lobes, truncate in front; length 11-9.5 mm. 



LiVII. Beachyluuls. 

 iKi. Eighth Ktria of elytra very close to the margin, the ninth indistinct ; 

 eyes truncate behind ; color black or piceous. 

 (1. All the tarsi pubescent beneath ; clypeus with a bristle-bearing punc- 

 ture each side ; labrum with six setse ; length 9.5-10 mm. 



LTIII. Lachxocrepis. 

 (IiJ. Hind tarsi not pubescent beneath. 



e. Front tarsi of males with four joints dilated, the flrst three spongy 

 beneath ; clypeus without bristle-bearing punctures ; labrum with 

 six set« ; length 5-6 mm. LIX. Amatbichis. 



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

 joint of labial palpi without setae in front; thorax as wide at 

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



LV. Chl.^nius Bon. 1813. (Gr.. "a cloak or mantle.") 



This genus 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 niimber 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, when^ tlie,^' feed largely upon other in- 

 sects. In 23 individuals dissected by Dr. Forbes. X'^> per cent, of 

 the stomach content was found to be of animal origin. ()f this 65 

 per cent. wa,s of insects, chiefly cutwcjnns, canker- worms and other 

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

 Oarabidae. 



About 43 species of C'hlaenius 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: 



LfCovte. — "Analytical Table of the Species of Ohlaenius 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, Y, 1876, 253. 



iIor/(.— "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. 



