THE GROUND BEETLES. 



55 



c. Form elongate ; humeral carina long, curved outward in front ; 



elytra smooth; length 23-26 mm. 4.7. elonoatus. 



cc. Form broader ; humeral carina short ; elytra usually with pairs 

 of punctures; length 28-30 mm. '48. punctulatus. 



45 (210). Pasimachu s subl^evis Bon., Obs. Ent., 1813, 46. 



Elongate-oblong. Black with blue margins. Thorax subquadrate. 

 front angles prominent, sides feebly curved, suddenly converging at basal 

 third. Elytra with sides parallel, convex ; disk with faint rows of small 

 punctures. Length 21-28 mm. (Fig. 40.) 



Known from Indiana by a single specimen taken from beneath 

 a log on the sandy margin of the old canal north of Terre Haute, 

 Vigo County. May 16. 



46 (214). Pasimachus depressus Fab., Syst. Ent., I, 1792, 94. 



Black, usually with blue margin. Labrum broadly and feebly trilobed ; 

 mandibles feebly or not at all striate. Hind tarsi long and slender. Fe- 

 male dull, male shining. Length 24-30 mm. (Fig. 41.) 



Common singly or in pairs beneath stones and logs on the slopes 

 of high hills near Wyandotte, Crawford County. May 17-June 26. 



47 (217). Pasimachus elongatus Lee, Ann. Lyc. Nat. Hist., IV, 1848, 



147. 



Black with blue margins. More elongate and less broad than the pre- 

 ceding ; hind tibiae and tarsi less slender. Labrum broadly trilobed, the 

 middle lobe the wider ; mandibles finely but distinctly striate. Length 

 23-26 mm. 



Lake, Marion and Vigo counties ; scarce. May 16-August 26. 



48 (21S). Pasimachus punctulatus II a Id., Proc. Phil. Acad. Nat. Sci., I. 



299. 



Allied to P. depressus, but differing by the hind tibiae and tarsi being 

 less slender and less elongate, and by the hind tibiae of the male being 

 densely pubescent on inner side near tip. Elytra usually with rows of 

 punctures, approximate by pairs. Mandibles deeply and coarsely striate. 

 Length 28-30 mm. (Fig. 42.) 



Throughout the State ; frequent. April 2-July 6. 



X. Scarites Fab. 1775. (NL., "a scratcher.") 



Narrow, oblong black beetles having the body very plainly pe- 

 dunculate ; hind angles of thorax wanting; elytra parallel, rounded 

 behind and without humeral carina'; front tibia? widened, flattened 

 and toothed on outer side. 



Two species occur in our fauna, and are quite common about 

 gardens and borders of cultivated fields beneath logs, stones and 

 rubbish. They feed upon animal food alone and are very ben- 

 eficial. 



