THE GROUND BEETLES. 55 



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



elytra smooth ; length 23-26 mm. 47. elongatus. 



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



of punctures ; length 28-30 mm. 48. puhotulatus. 



15 (210). l'A.siMACHUs suBMSvis Bou., Obs. Ent., 1813, 46. 



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

 'rent angles prominent, sides feebly curved, suddenly converging at basal 

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

 mnctures. Irength 21-28 mm. (Fig. 40.) 



Known from Indiana by a single specimen taken from beneath 

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

 ^igo County. May 16. 



l-G (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 

 ^f high hills near Wyandotte, Crawford County. JMay 17-June 26. 



17 (217). Pasimachus elongattjs Lee, Ann. Lye. Nat. Hist., XV, 1S48, 



147. 

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

 ceding; hind tibiffi and tarsi less slender. Labrum broadly triloi)ed, the 

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

 23-26 mm. 



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



18 (218). Pasimachus punctulatds Hald., Proc. Phil. Acad. Nat. Sci., I, 



299. 

 Allied to P. depresstis, but differing by the hind tiblse and tarsi being 

 less slender and less elongate, and by the hind tibife 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. ScARiTBS Fab. 1775. (NL.,""a scratcher.") 



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

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

 behind and without humeral carinsc; front tibin; widened, flattened 

 ind toothed on outer side. 



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

 gardens and borders of cultivated fields ])encat]i logs, stones and 

 rubbish. Tliey feed upon auinial food alone and ai'c verj^ ben- 

 eficial, 



