704 FAMILY XXXVII. ELATERID/E. 



described it under the name of Eiicncmis obliqiuts. The males are 

 rare, but three of the 21 specimens taken being of that sex. 



III. STETHON Lee. 1866. (Gr., "breast.") 



Medium-sized cylindrical species, having the head convex, deeply 

 inserted in thorax ; antenmv reaching base of elytra, their grooves 

 deep, narrow, marginal, closed behind ; last ventral segment more 

 or less prolonged at apex. 



1329 (4029). STETHON PECTOROSUS Lee., Proc. Phil. Acacl. Nat. Sci., 1866, 



386. 



Cylindrical, robust, slightly narrower behind the middle. Uniform brown 

 or piceous, subopaque. Antenme flattened, first joint stout, as long as the 

 next three; joints 4 to 10 gradually very little shorter. Head coarsely and 

 densely punctured. Thorax slightly longer than wide, sides curved in 

 front, straight and parallel behind the middle, hind angles obtuse; disk 

 strongly convex, densely and rather rugosely punctured. Elytra striate ; 

 intervals convex, densely and roughly punctured. Hind tarsi with the 

 first joint as long as the next four. Length 6-9 mm. 



Posey and Crawford counties; rare. June 1 4-July 1. Occurs 

 beneath bark of hickory. Known from Ohio, Illinois and Missouri. 



Eucnrniin anuricfi na Horn, oblong, piceous-black, antennae and 

 legs brownish, is known from Kentucky and Ohio. 



IV. DELTOMETOPUS Bonv. 1871. (Gr., "triangle + forehead. ") 



Small, slender-bodied, black species, having the elytra gradually 

 narrower to apex and first joint of hind tarsi as long as the next 

 three. One of the two species has been taken in the State, while the 

 other doubtless occurs. 



1330 (4030). DELTOMETOPUS AMCENICORNIS Say. Trans. Amer. Phil. Soc., 



VI, 1836, 189; ibid. II, 628. 



Elongate, moderately convex. Piceous, feebly shining, sparsely clothed 

 with grayish pubescence; legs and two basal joints of antenme reddish- 

 brown. Antenn.T not quite as long as half the body; joints 5-10 pectinate 

 in male, serrate in female, the groove distinctly wider behind the middle. 

 Thorax a little wider than long, narrower in front; sides straight, male, 

 or widest behind the apex with sides in front curved, female; disk convex, 

 rather densely punctate. Elytra striate, intervals slightly convex, rather 

 densely rugosely punctate. Length 3-4.5 mm. 



Throughout the State; scarce. June 5-July 25. Beaten from 

 vegetation ; more frequently in damp localities. 



f>. rn/ii>f* Melsh., brown or piceous, antenna 1 longer than half 

 the body. male, filiform in both sexes, length 3.5-.").,") mm., is re- 

 corded from ('anada and Ohio. 



