THE GROUND BEETLES. 



51 



KEY TO INDIANA GENERA OF NEBRIINI. 



a. Size small, not over 5 mm. ; front tibiae very obliquely truncate, the 

 inner spur above the apex; vertex suleate. VII. Notiophili s. 



au. Size medium. S or more mm.; front tibiae not obliquely truncate, spurs 

 terminal ; vertex not suleate. VIII. Nebria. 



VIII. Notiophilus Dum. 1806. (Gr., spring + loving.'') 



Small oblong black or bronzed beetles, having the head hori- 

 zontal, triangular, striate, and as broad as or broader than the 

 thorax ; eyes prominent ; elytra with sides almost parallel, but 

 little broader than thorax. They occur beneath leaves along the 

 margins of open woods and cultivated fields, and in early spring 

 are frequent about the bases of trees and stumps and the sides of 

 logs. Eleven species are known from the United States, three of 

 which have been taken in Indiana. Our species belong to the group 

 having the front 5-striate. 



The latest and best paper on the genus is that of : 

 Fall, H. C. — "A Review of of the North American Species of 

 Notiophilus" in Psyche. XIII, 1906. 79-92. 



KEY TO INDIANA SPECIES OF NOTIOPHILUS. 



a. Legs and antennae entirely pale reddish-brown-; bead much wider than 

 thorax, the sides of the latter deeply sinuate behind the middle. 



41. JENEUS. 



(Ufa. Legs dark, or with the tibiae alone paler; antennae pale at base only. 

 I). Elytra each with one apical annulate puncture ; second elytral in- 

 terspace equal to two intervals in width ; size larger, form stouter. 



42. SEMISTRIATUS. 



hi). Elytra each with two apical annulate punctures; second elytral 

 interspace broader, equal to three intervals in width ; size smaller, 

 more slender. 43. novemstriatus. 



41 (173). Notiophilus ^eneus Hbst, Col., X, 1S06, 235. 

 Metallic bronze, shining. Thorax coarsely punctured near 



base and apex, disk smooth ; hind angles acute, prominent. Punc- 

 tures of elytral strise deep at base, becoming indistinct behind 

 the middle; the second elytral interspace as in semistriatus. Fi s- 39 - 

 Length 5 mm. (Fig. 39.) (AfterLeng.) 



Lake. Vigo and Posey counties; scarce. May 18-Jnne 18. 



42 (177). Notiophilus semistriatus Say. Trans. Amer. Phil. Soc, [I, 



1823, 81 ; ibid. II, 407. 

 Rather stout. Blackish or purplish-bronze, strongly shining; tibiae 

 and four basal joints of antennae usually pale. Terminal joint of palpi 

 dilated and truncate. Thorax coarsely punctate at sides, apex and base, 

 the disk smooth ; sides strongly sinuate behind the middle. Elytral striae 



