180 



FAMILY II. CARABIM2. 



KEY TO GROUPS OF INDIANA HARP ALUS. 



a. Elytra without a dorsal puncture oh the third interval. Group A. 



a a. Elytra with a small dorsal puncture on the third interval behind the 

 middle and near the second stria. Group B. 



Group A. 



To this group as denned above belong our largest and most 

 common species. In the keys which follow the "accessory setae" 

 refer to long bristles located about midway between the ambula- 

 tor] al seta 1 and the side of the abdomen. 



KEY TO INDIANA SPECIES OF GROUP A. 



a. Elytra distinctly, sometimes deeply, sinuate at tip ; abdomen without 

 accessory setae. 



h. Color above not (or very rarely) black or piceous; thorax distinctly 

 narrower behind the middle ; elytra deeply sinuate, outer angle 

 acute in female. 



c. Pale reddish-brown above, elytra often darker ; body elongate ; 



length 14 or more. 330. erraticus. 



cc. Metallic green or coppery (very rarely black) ; length 9.5-10 mm. 



VIRIDL^NEUS. 



1)1). Uniform black, piceous or dark reddish-brown above; elytra much 

 less deeply sinuate, the outer angle not acute in female. 



d, Mentum not toothed ; legs black ; length 21-25 mm. 



331. CALIGINOSUS. 



dd. Mentum toothed; legs and antennae reddish-brown. 



e. Uniform piceous or dark brownish-red above; thorax nearly 

 square, its side margins depressed, scarcely wider behind. 



f. Intervals of elytra more or less convex ; sides of thorax feebly 



rounded; length 12.5 mm. 332. faunus. 



ff. Intervals flat; sides of thorax more rounded in front; length 

 10.5-12 mm. 333. convivus. 



ce. Uniform black above. 



g. All the intervals of elytra of female densely punctate; in male 



those on sides only ; length 13.5-15 mm. 334. vagans. 



gg. Discal intervals of elytra of female not or sparingly punctate. 

 h. Thorax slightly narrowed in front, not narrowed behind; 

 region of the basal angles strongly depressed, densely punc- 

 tate. 335. PENNSYLVANICUS. 



hh. Thorax slightly narrowed behind, not narrowed in front; 

 region of the basal angles feebly depressed. 

 i. Larger. 13.5-16 mm. 

 j. Thorax one-third or more broader than long ; sides of 

 elytra not punctulate. 336. compar. 



jj. Thorax nearly as long as broad; sides of elytra finely 

 punctulate. 337. longior. 



id. Smaller, 10.5 12 mm.; margin of thorax narrowly reddish- 

 brown, translucent. 33S. erythropus. 



