THE CLICK BEETLES. 



705 



V. Drom^eolus Kies. 1858. (Gr., "to run.") 



Antennas filiform or very feebly serrate ; head convex, deeply in- 

 serted in the thorax; mandibles robust, the exposed surface large 

 and rugose; antennal grooves deep, sharply limited, open behind. 

 One species has been taken in the State, while two others perhaps 

 occur. 



KEY TO INDIANA SPECIES OF DROM^EOLUS. 



a. Clypeus at base half as broad as the apical margin ; body above black. 

 6. Elytra faintly striate ; abdomen rather densely and finely punctured ; 

 pubescence conspicuous. harringtoni. 

 66. Elytra without striae ; abdomen coarsely punctured ; pubescence very 



SparSe « 1331. CYLINDRICOLLIS. 



aa. Clypeus at base very narrow; color above piceous ; antenna- half as 

 long as body ; elytra not striate. pusillus. 



D. harringtoni Horn, elongate, length 5.5-6 mm., is recorded 

 from Ohio ; D. pusillus Horn, oblong, length 3.5 mm., was described 

 from northern Illinois and Texas. 



1331 (4033). DROMiEOLUs cylindricollis Say, Trans. Amer. Phil. Soc, 

 VI, 1835, 188 ; ibid. II, 627. 

 Elongate, moderately convex, slightly narrower behind the middle. 

 Black, shining, sparsely clothed with inconspicuous yellow hairs. Antennaa 

 piceous, subserrate, not extending beyond hind angles of thorax. Head 

 coarsely and deeply punctured. Thorax longer than wide, sides straight 

 and parallel behind the middle, obliquely converging on apical third ; me- 

 dian line deeply impressed on basal third ; surface rather densely punctate 

 on sides, less so at middle. Elytra without stria?, except the sutural, which 

 extends two-thirds from apex to base ; surface rather coarsely but not very 

 densely punctured. Length 7-8.5 mm. 



Kosciusko and Posey counties ; rare. June 11-August 11. 



VI. Fornax Lap. 1835. (L., "a furnace. ") 



Beetles of small or medium size, having the head convex, deeply 

 inserted; prosternal sutures distinct, slightly divergent; antennal 

 grooves deep, sharply limited on each side; elytra striate; last 

 ventral segment obtuse; hind tarsi with the first joint as long as the 

 others combined, the fourth broader, excavated above and slightly 

 lobecl beneath. Three species have been taken in Indiana, while 

 two others probably occur. 



KEY TO INDIANA SPECIES OF FORNAX. 



a. Second joint of antenna- as long, or very nearly as long as fourth. 

 6. Color pale chestnut brown ; front without trace of carina between the 

 eyes - RADIUS. 



