156 [November, 1S44. 



8. A. seneolus. Dark brown-brassy, pubescent; front faintly impressed. — 5| 

 1. long; 1| 1. wide. Pennsylvania. 



Brassy-brown or black: head rugosely punctured, clothed with yellowish 

 hairs, with the clypeus almost flat, not prominent, the anterior edge rather obtu- 

 sely rounded and glossy, slightly reflexed ; antennae dull rufous, or blackish, 

 pubescent, longer than the thorax, with the joints almost simple ; second joint 

 two-thirds the length of the third, which is smaller than the fourth ; terminal 

 joint longest cylindiic, and very ohsoletely subulate: thorax subquadrate, con- 

 vex, slightly wider behind than before, slightly rounded at the sides ; densely 

 clothed with an ochreous pubescence, closely and minutely punctured ; medial 

 line faintly defined, sometimes not apparent ; hind angles short, subacute, slightly 

 excurved, slightly carinate : scutellum rather somewhat convex, densely ashy- 

 pubescent, elytra progressively arcuated from behind the middle to the apex, 

 which is acutely rounded; punctate-striate, the interstices somewhat convex, 

 finely and distantly punctured, transversely wrinkled : beneath black, thinly 

 pubescent, hind margins of posterior abdominal segments rufo-piceous : feet dull 

 rufous. 



9. A. xreus. Brassy; thorax dark fuscous, finely and densely punctured, 

 pubescent; elytra dusky reddish-brown; antenna?, feet, epipleura? and apical 

 margins of posterior ventral segments, rufous. Pennsylvania. 



Elater sereus, Melsh. Catal. 



Size of the preceding, which it strongly resembles, but is somewhat wider, the 

 thorax shorter, wider and more strongly arcuated at the sides ; the antennce are 

 more simple, shorter and with the joints more cylindrical, even in $> s ; the 

 second joint is more than two-thirds the length of the third ; fourth joint a little 

 more robust than the fifth ; terminal joint shorter, and less distinctly subulate 

 than in the preceding species ; form and sculpture of the head and elytra, ves- 

 ture of the scutel; and color of the body beneath, as in the preceding species. 



10. A. procericollls. Linear; thorax oblong-subquadrate, dusky reddish- 

 brown ; face triangularly impressed ; antenna and feet pale testaceous. — 5 1. 

 long ; 1§ 1. wide. Pennsylvania. 



Elater longicollis, Melsh, Catal. 



Linear, finely and not densely pubescent : head confidently punctulate, with 

 the clypeus porrect, triangularly impressed, obtusely rounded and hardly deflex- 

 edattip; color of the thorax; antennre and palpi testaceous, the first much 

 longer than the thorax, slender, subserrate, with the second joint one-third the 

 length of the third, which is longer than the fourth, terminal joint distinctly 

 subulate: thorax oblong, convex, with the sides feebly rounded; finely and 

 densely punctured; medial line faint, very slender, glossy ; chestnut-brown, with 

 the posterior angles paler, short, robust, subacute, slightly excurved, obliquely 

 and very feebly carinate : scutellum color of the thorax, coarsely punctured : 

 elytra with the sides gradually narrowed from behind the middle to near the 

 apex, which is acutely rounded ; punctate striate, the interstices, finely and not 

 densely punctured and transversely wrinkled; reddish-brown : beneath rufous: 

 feet testaceous. 



11. A. arcticollis. Reddish-brown; thorax elongate, narrow ; face triangu- 



