THE GROUND BEETLES. 105 



their stria 1 are distinctly punctured in hut one of the nine, while 

 the hind angles of thorax are never carinate. The group includes 

 the subgenera Trice na and Amara of Hayward's paper. 



KEY TO SPECIES OF GROUP B. 



(/. Apical spur of front tibia? triiid ; scutellar stria <it' elytra terminating 

 in an ocellate (eye-like) puncture at base; antenu;e with the three 

 or four basal joints pale. 



h. Thorax narrowed from base to apex, its hind angles obtuse; fourth 



joint of antenna- in great part pale. 155. ANGUSTATA. 



lib. Thorax narrowed from slightly behind the middle to apex, hind 



angles sharply rectangular; fourth joint of anteimse in great part 



piceous. PALLIPES. 



a<i. Apical spur of front tibia' simple. 



<: Basal joints of antenna:* not carinate; prosternuni of male not punc- 

 tured. 



(I. Scutellar stria terminating in an ocellate puncture: femora piceous 

 or dark reddish-brown. tibi.-e and tarsi paler. 



156. JMPfNCTICOLLIS. 



ild. Sciitellar stria without ocellate puncture. 



c. Elytra 1 stn;<> punctured; base of thorax tinely punctured. 



I.".!. liASII.LAIUS. 



cc. Klytral stria' not or obsoletoly innictured : base of thorax smooth. 

 f. Thorax narrowing from basal angles to apex; form broad, ro- 

 bust : terminal spur of front tibia 1 stouter than usual. 



CBASSISPINA. 



/'/. Thorax narrowing from in front of base; form oblong-oval: 

 terminal spur of front tibue normal. 15.S. CUPREOLATA. 



<<: Antenna 1 with basal joints 1' and :t carinate above. 



.'/. Scutellar stria ending ii, an <.;-el!ate puncture. 15!i. FALLAX. 



'/.'/. Scutellar stria without puncture. 



//. Basal impressions of thorax very faint; larger, 7.5-0 mm. 



160. PROTENSA. 



////. Basal impressions of thorax distinct, the outer oblique; smaller, 

 6-7 mm. 161. POLITA. 



15. r > (651). AMARA ANGUSTATA Say. Trans. Amer. Phil. Soc.. II. 1S23, 36: 

 ibid. II, 46::. 542. 



( )val. convex. Black, bronzed, shining : legs dull reddish-yellow. Thorax 

 one-half wider than long, hind angles obtusely rounded, outer basal impres- 

 sion obsolete, the inner small, sparsely or not at all punctured. Elytra 

 not wider than thorax, gradually narrowed from the base; surface finely 

 alutaceous. the stri-e not punctured, or sparsely punctate at base; scutellar 

 stria ending in a large eve-like puncture. Length 6-7.5 mm. 



Common in southern half of the State; less so in the north. 

 April 10-JiiPo :'(!-. (hi the first warm days <>f early spring this spe- 

 cies and the next arc often found miming rapidly about near the 

 liases of trees and stumps in open woodland pastures. 



