164 



FAMILY II. CARABIDJE. 



RF.T TO GROUPS OF TNDANA SPFXTKS OF CHE.^ENIT'S. 



a. Third joint of antenme longer than fourth; middle tibiae of male with a 

 pubescent space near the tip. Group A. 



a a. Third joint of antennae not longer than fourth (except in tomentosus) ; 

 middle tibiaa of male without a pubescent space at tip. Group B. 



Groet A. 



In this group the males have a pubescent space of greater or 

 less extent near the tip of the middle tibiae. This is usually on the 

 outer edge, but sometimes in front of the tibiae. The basal line and 

 side margin of the elytra unite at the humerus to form either a dis- 

 tinct angle or a regular curve: and ■* basal line angulate at hu- 

 merus" and "basal line curved at humerus" are terms used to 

 designate the two modes of union. 



KEY TO INDIANA SPECIES OE GROUP A. 



a. Abdomen smooth at middle, sparsely and finely punctured on the sides. 

 &, Prosternum not margined at tip, feebly punctured or smooth in front ; 

 male with front femora subangulate at base, 

 c. Color bright green, shining; length 12-14 mm. 291. solitaries. 

 cc. Color dark blue; thorax subopaque, elytra opaque; length 13- 

 15 mm. 295. leucoscelis. 



TjJj. Prosternum margined at tip, coarsely punctured in front ; color green, 

 the last ventral segment nearly wholly brownish-yellow; length 

 j 7 mm. 296. prasinus. 



aa. Abdomen sparsely punctured at middle, more densely at sides. 



cl, Episterna (side pieces) of metasternum short, the outer side shorter 

 than the front one ; thorax narrower at base than elytra. 

 e. Thorax greenish-bronzed above, the sides distinctly sinuate near 

 base; front femora of male subangulate at base. 297. jestivus. 

 ee. Thorax violet or purplish-blue above, not sinuate near base. 



f. Thorax wider than long; front femora of male subangulate at 



oase . PLATYDERUS. 



ff. Thorax about as long as wide ; front femora of male simple. 



298. DIFFINIS 



dd. Episterna of metasternum long, the outer side longer than the front 

 one. 



g. Sides of thorax not or feebly sinuate near base. 



h. Color bright green to blue, legs pale. 299. sericeus. 



hh. Color blackish or dark blue. 



i. Smaller, 13-15 mm. ; base of thorax as wide as elytra ; front 



femora of male toothed at base. 300. laticolus. 



ii. Larger, 21-23 mm. ; base of thorax narrower than elytra ; front 



femora of male simple. fuscicobnis. 

 gg. Sides of thorax distinctly sinuate near base ; color and size of fus- 

 cicornis. 301. erythropus. 



