THE CLICK BEETLES. 709 



M. subsinuatus Lee, piceous or nearly black, posterior supple- 

 mentary carina very long, length 3.5-5 mm., is recorded from Can- 

 ada, Ohio and Virginia; M. impressicollis Bonv., reddish-brown, 

 length 5.5-6.5 mm., is a southern species recorded by Dury from 

 near Cincinnati. 



1338 (4055). MicRORHAGUs triangularis Say, Journ. Phil. Acad. Nat. Sci., 



Ill, 1823, 170; ibid. II, 110, 628. 



Elongate-oblong, slender, narrower behind the middle. Piceous or 

 black, feebly shining ; antennse and legs brownish. Antennae feebly ser- 

 rate, one-half, female, or three-fourths, male, the length of body. Thorax 

 nearly as wide as long, sides straight and parallel, hind angles carlnate, 

 disk rather coarsely and densely punctured. Posterior supplementary 

 carina reaching the middle of thorax. Elytra obsoletely striate, closely 

 and roughly punctate. Length 3-4 mm. 



Koscuisko, Marion and Posey counties ; scarce. May 1-July 11. 



1339 (4054). MicROBHAGUs pectinatus Lee, Proc. Phil. Acad. Nat. Sci., 



1866, 387. 

 Elongate-oblong, slightly narrowed behind the middle. Piceous, mod- 

 erately shining; legs brownish, tibise and tarsi paler. Antennae two-thirds 

 the length of body and pectinate, male ; one-half the length of body, acutely 

 serrate, female. Thorax wider than long, sides parallel, rounded in front, 

 hind angles finely carlnate; surface rather coarsely but not densely punc- 

 tured. Antennal grooves slightly wider behind, the outer carina entire, 

 extending to hind angles of thorax. Elytra as wide at base as thorax, 

 vaguely striate, densely and coarsely punctured. Length 4.5-5 mm. 



Marion and Crawford counties; scarce. April 20-May 1. Oc- 

 curs in partially rotten elm and other logs. 



Entomophthalmus rufiolns Lee, pale reddish-brown, antennae 

 nearly as long as body, second and third joints very small, together 

 shorter than fourth, length 4 mm., is known from Ohio and Illinois. 



VIII. I-Iylochaees Latr. 1834. (Gr., " forest -f rejoice.") 



Small robust species, having the antennte short, not passing hind 

 angles of thorax, joints -4-10 equal, as broad as long ; elypeus nar- 

 rowed at base, trilobed in front; hind coxal plates parallel; first 

 joint of hind tarsi as long as the next two, lobed beneath. 



1340 (4067). Hylochares nigricoknis Say, Journ. Phil. Acad. Nat. Sci., 



Ill, 1823, 165 ; ibid. II, 107. 

 Subcylindrical, robust. Black, feebly shining; apical and sometimes 

 basal margins of thorax reddish. Head and thorax coarsely, densely and 

 deeply punctured. Thorax broader than long, sides curved on apical half; 

 disk with a deep and broad median line and an oblique impression near 

 hind angles. Elytra deeply striate, striae coarsely punctured; intervals 

 finely and rugosely punctate. Length 8-9 mm. 



