214 [March, IS45. 



Chyptohypnus, Esch. 



1. C obliquatulus. Blackish; thorax castaneous ; feet and an oblique 

 band on the elytra, testaceous. — 1^ 1. long, A I. wide. Pennsylvania. 



Ovate, glabrous, shining, closely and very minutely punctured : head black, 

 with the clypeus at tip margined and obtusely rounded ; antennae slender, with 

 the third joint smaller than the second, which is as long as the fourth, but less 

 robust : thorax convex, widest in the middle, narrower at base than the base 

 of the elytra, with the sides obtusely rounded ; posterior angles short, acute, 

 carinate, slightly excurved : elytra slightly widest behind the middle; sides 

 arcuated from the base to the apex ; more obsoletely punctulate than the thorax ; 

 each elytrum with an oblique pale testaceous fascia on the middle, not reaching 

 the suture : feet and pectus pale testaceous: abdomen sometimes pale brown. — 

 Strictly not belonging to this genus. 



2. C. guttatulus. Black, opake ; elytra sparsely maculate with rufous. — 

 If 1. long. Pennsylvania. 



Oblong-ovate, deep black, opake, slightly pubescent : head minutely and 

 densely wrinkled, with the tip of the clypeus obtusely rounded and finely mar- 

 gined : antennas as in the preceding, not surpassing the base of the thorax, 

 slender, dusky, with the second joint rather longer than the third : thorax, 

 form like in the preceding, but less convex, and with the sides less dilated ; 

 minutely and densely longitudinally wrinkled, with a capillary smooth dorsal 

 line, often obsolete ; posterior angles as in the preceding, rather more excurved, 

 with the carinse more prominent, longer and parallel to the lateral edge : elytra 

 striate, striae obsoletely punctulate, the interstices convex, not wider than the 

 striae ; sides slightly arcuated from base to apex; each elytrum with a humeral 

 spot, and an orbicular one behind the middle, testaceous : feet testaceous ; pos- 

 terior femoral plates as in the preceding species, abruptly dilated within. The 

 spots on the elytra vary in size and number ; sometimes the humeral spot is 

 very large and connected with a smaller discoidal one ; sometimes it is single 

 and orbicular. Specimens occur which are also maculate at the apex of the 

 elytra. It is quite an abundant species. 



Oophohus, Eschsch. 



O. crassicullis. Dark fuscous; antennae and feet, dull rufous. — 3 1. long, 1 1. 

 wide. Pennsylvania. 



Elater crasslcollls, M. Catal. 



Dark brown or blackish : head densely punctulate, with the clypeus short, 

 wide, at tip immarginate, obtusely rounded, almost truncate, slightly declined ; 

 antennae dusky rufous, subfiliform,some longer than the thorax, with the second 

 joint one-third shorter than the third ; fourth and remaining joints slightly and 

 obtusely serrated : thorax moderately convex, hardly longer than wide, slightly 

 wider at base than at apex, deeply and densely punctulate, and like the head, 

 sparsely and finely pubescent : medial line slightly apparent only towards the 

 base ; sides obtusely rounded ; posterior angles straight, subacute, obsoletely 

 dull rulo-piceous, finely carinate, carinae parallel to the lateral edge : elytra 

 punctate-striate, the interstices subconvex, confluently and finely corrugated : 



