308 PROCEEDINGS OP THE ACADEMY OF 



Outer basal fovea wanting, color blue, legs ferruginous. 54. hicolor Lee. ' 

 More convex and shining, dorsal punctures 3 ; feebly bronzed, legs 

 piceous or ferruginous. 55. convexicollis Say. 



G. 

 (Prothorax more or less narrowed behind, basal angles carinate, foveas 

 large and deep, bistriate, punctulate ; elytra with 3 dorsal punctures, 

 and long scutellar stria, sinuate near the tip, humeri dentiform ; 

 posterior tarsi with first joint feebly grooved on the outer side.) 

 Prothorax strongly narrowed behind, angles rectangular prominent : 

 Larger, very shining, basal fovese impunctured, elytra iridescent, stria? 



fine. 56. acutangulus Chaud. 



Smaller, basal fovese punctulate, elytra more deeply striate ; nigrita X 

 Kirby, agrestis Bland. 57. caudicalis (Say), 



Prothorax less narrowed behind, angles small rectangular, slightly 

 prominent ; basal fovese punctured ; elytral strise deep : 

 Still smaller, slender; abjectus Lee. 58. luctuosus Dej. 



Broader and larger; tenebrosus Chaud. 59. corvinus Dej. 



H. 



(Posterior tarsi with 2 or 3 joints grooved on the outer side ; prothorax 



moderately narrowed behind, angles not prominent, basal fovea? 



linear deep ; elytra with three dorsal punctures, scutellar stria long, 



humeral angles not dentiform, tip sinuate.) 

 'a. % with inner side of hind tibia? clothed with hair ; 3 tarsal joints 



grooved; 

 Color purplish, basal impressions of prothorax not punctured, hind angles 



rather obtuse. 60. purpui'atus Lee. 



Color black, basal impressions of prothorax more or less punctured, angles 



small rectangular; morosus Dej., picicornis K'lrhy. 61. mutusSny. 

 b. '^ with the hind tibise not hairy on tlie inner side ; tarsal grooves less 



deep, not extending to the third joint; 

 Prothorax feebly sinuate on the sides behind, hind angles rectangular, 



basal fovese feebly punctured. 62. lusirans Lee. 



I. 



(Posterior tarsi with 3 joints grooved, though sometimes not very deeply; 



prothorax with basal impressions linear, more or less punctured, angles 



rectangular or obtuse not rounded ; elytra with 5 or 6 large dorsal 



punctures, humeri not dentiform, tip deeply sinuate, scutellar stria 



long. Species indefinite and opinionative, especially in the differences 



between orinomum and Luczotii.) 



a. Elytra in both sexes shining : 



Hind angles of prothorax small, prominent, dentiform. 



63. pensylvanicxis u. sp. 

 h. Elytra of 9 tlull, of % shining : 



Sides of prothorax more broadly depressed : 



Sides of prothorax slightly sinuate behind, angles rectangular. 



64. vitreui Dej. 



