THE GROUND BEETLES. 183 



characters, when once recognized, being more evident than in many 

 of the species of Bem~bidhun, Chlccuius and other genera of the 

 family. 



337 (lOSTb). HARPALUS I.OXGIOK Kirby. Faun. Bor. Amer., IV, 1838, 43. 

 Elongate, narrower than the two preceding. Thorax about as long as 



broad (4.5x4 mm.), gradually narrower behind the middle, distinctly nar- 

 rower at base than in compar; hind angles obtuse; basal impressions wide, 

 shallow, densely punctate. Elytra alutaceous, intervals of male subconvex. 

 the fifth to eighth finely and sparsely punctate. Length 13.5-15 mm. 



Marion. Vigo and Floyd counties; scarce. June 2 Septem- 

 ber 11. 



338 (10S7c). HARPALUS ERYTHROPUS Dej., Spec. IV, 1828, 258. 



Oblong. Thorax nearly square, slightly narrowed behind, sides feebly 

 curved, hind angles but little rounded; basal impressions broad, shallow, 

 finely and densely punctate. Elytral intervals alutaceous, not punctate. 

 Length 10.5-12 mm. 



Southern half of State, common; less so northward. April 27- 

 October 5. A pair were taken mating on September 29. 



339 (1119). HARPALUS TESTACEUS Lee., Trans. Amer. Phil. Soc., X, 1853, 



385. 



Oblong-oval. Color given in key. Thorax one-half broader than long, 

 sides feebly curved to behind the middle, thence sinuate to base; margin 

 rather broad, depressed, with a row of punctures; hind angles rectangular, 

 basal impressions small, sparingly punctate. Elytral strife deep; intervals 

 convex. Length 10-10.5 mm. 



Starke and Posey counties; scarce. August 23-September 19. 

 Occurs in sandy localities. The hind angles are more prominent 

 than in any other species of Harpahts. 



GROUP B. 



The species of this group average much smaller than those of 

 Group A. 



KEY TO INDIANA SPECIES OF GROUP B. 



a. Elytra obliquely but distinctly sinuate at tip; abdomen without ac- 

 cessory seta?. 

 1>. Bicolored above ; head and thorax reddish-brown, elytra black or 



piceous. 



c. Thorax scarcely narrowed behind; basal depressions shallow, finely 



punctured. 340. DICHROUS. 



cc. Thorax distinctly narrowed behind ; basal impressions deeper, more 



coarsely punctured. 341. VULPECXTLUS. 



hb. Uniform black or piceous above. 



(1. Legs reddish-brown; extreme margin of thorax pale. 



