SOME NORTH AMERICAN INSECTS. 183 



with hardly perceptible, raised, obtuse lines; punctures profound, dense- 

 ly and irregularly set : feet piceous : pectus, tarsal grooves none. — 

 Length eleven-twentieths of an inch. 



Smaller than E. marmoratus, F., and more slender, with a more 

 equal thorax; larger than E. tepturus, S,, discoideus, Weher, impressi- 

 collis, S., and red angular is ^ S., and the punctures of the elytra are not 

 in regular series. It seems to approach nearer to E. operculatus, S., 

 but the elytra are more obtuse at tip, and have much more profound, 

 large, and close set punctures. I have not now an entire specimen of 

 the latter species, and therefore cannot compare with the anterior part 

 of the body. ^ 



1 1 1 1 Claws pectinated. 



65. E. corticinus, S. (Journ. Acad. Nat. Sc, III., p. 174.). The 

 second and third joints of the antennae are rounded, equal. The basal 

 margin of the thorax has a fissure each side, near the lateral spines. 

 It varies in size. The smallest one that I have seen is seven-twen- 

 tieths of an inch. Can it be the dispar of Herbst? 



66. E. cinereus, Weber. Second joint of the antennae about half 

 the length of the third : the thorax is more rounded at the sides than 

 the preceding. It varies considerably in size. The basal margin of 

 the thorax has a fissure each side. — Length from three-tenths to seven- 

 tenths of an inch. The former size is rare ; but the more usual length 

 is about half an inch. 



This is the vulgaris and pilosus of Melsheimer's Catalogue. It re- 

 sembles the brunnipes, Ziegler ; but the thoracic punctures are rather 

 larger, and less crowded, the thoracic spines are longer and more acute, 

 and the second joint of the antennae is a little longer in proportion to 

 (he third.* 



* [Among Mr Say's manuscripts is a description of the cinereus, under the rejected name 

 oijissilis, which, as it contains the characters of this species somewhat in detail, it may be 

 proper to insert here.]] 



E.Jissilis. Brown; base of the thorax with a fissure near the posterior angles. — Inhab. 

 U. S. 



Body chestnut-brown, punctured, somewhat sericeous with short hairs: head convex: 

 dypeus rounded at tip: antennas rufous; second joint half as long as the third; ultimate joint 

 not abruptly contracted near the tip : thorax with the lateral edge regularly arcuated, not con- 



VI. — 2 v 



