FAMILY IT. CARABID^E. 



128 (555). PTEROSTICHUS PKRMTNPI s Say, Trans. Amer. Phil. Sue., IV. 

 1834, 420; ibid. II. 540. 



Elliptical or broadly oval. Black 

 or purplish, shining with iridescent 

 reflection ; antenna? and legs piceons. 

 Thorax broad, quadrate, a little nar- 

 rower at front than at base, side 

 margins narrow in front, wider, de- 

 pressed and punctured behind the 

 middle; basal impressions two on 

 each side, punctured, the outer very 

 short. Elytra 1 stria- not or very finely 

 punctured; the first dorsal puncture 

 on the third stria, the others on the 

 second. Length 12 14 mm. (Fig. 59. ) 



Described from Indiana. Oc- 

 curs frequently throughout the 

 southern half of the State be- 

 neath logs in open sandy woods. 

 Most co in in on in autumn. 

 March 31-October 20. 



GKOUP C. 



To this group belong large or 

 medium sized black, greenish or 

 bluish species having the side 

 pieces of metathorax long and 

 gradually narrowed from base to apex. The thorax varies much 

 in form, and its hind angles are never rounded. The dorsal punc- 

 tures range in number from three to six, and the inner wings are 

 .always present. Thirteen species comprise the group. 



KEY TO SPECIES OF GROUP C. 



. Three basal joints of antenna? distinctly carinate; basal impressions of 

 thorax double. 



b. Legs black; dorsal punctures two; body above green or bronzed, pol- 



ished ; under surface not punctured. 129. SAYI. 



hb. Legs usually reddish; dorsal punctures four; body above green or 

 bluish, not polished ; under surface punctured. 



130. LUCUBLANIH'S. 



an. Basal joints of antenna? simple, not carinate; color black, rarely pur- 

 plish. 



c. Dorsal punctures of elytra Iliree or four. 



il. Mind angles \' thora.x carinate; basal impressions large and deep. 



bistriate. 



f. Thorax much narrowed behind, (be angles rectangular and promi- 

 nent, 



Fig. 59. X 5. (After Forbes). 



