INSECTS COLEOPTERA. 47 



macula elongata a humero fere ad medium extensa, fasciaque postice concava pone medium 

 nigrisj strigaque postica submarginali fusca ornatis striis profunde punctatis, interstitiis parce 

 punctulatis ; abdominis lateribus sanguineis, pedibus ferrugineis, antennis fuscis, articulis 

 tribus baseos ferrugineis. Long. 53. 



One specimen, Steilacoom, George Gibbs, esq. Nearly related to E, cruciatus of Europe 

 and to C. pulcher Lee., (Trans. Am. Phil. Soc. 10, 440,) but sufficiently distinct by the fore 

 going characters. The red margin of the abdomen is gradually widened behind, so that the 

 last joint is red with a large basal black spot ; each segment is also margined with red ; the 

 anterior lobe of the prosternum is partly red, and the black extends beyond the prosternum 

 upon the pleuras, which are thus red with black margins, as in C. pulcher. 



AGRIOTES Esch. (emend. Lee.) 



A. macer, valde elongatus, ater opacus pubescens, thorace latitudine sesqui longiore, lateribus 

 parallelis, antice paulo rotundatis, confertim punctato, transversim minus convexo, elytris 

 striis punctatis, interstitiis sat dense punctatis, antennis articulis 2ndo et 3io coniunctis 4to 

 aequalibus. Long. 32. 



Shoalwater Bay, Dr. Cooper. Very closely resembles A. oblongicollis, (Dolopius oblongi- 

 collis Mels. ,) but the thorax is less convex transversely, and the feet are black. 



ELATER Linn, (emend. Esch.) 



E. rhodopus, ater breviter griseo-pubescens, thorace confertim punctato, postice subcanali- 

 culato, elytris striis vix impressis punctatis, interstitiis confertim rugose punctulatis, pedibus 

 antennisque ferrugineis, his articulo 3io secundo fere duplo longiore. Long. 45. 



Steilacoom, George Gibbs, esq., one specimen. Of the same form as E. luctuosus, Lee., 

 (Trans. Am. Phil. Soc. 10, 466,) but differs from that, as from all the species there described, 

 by the less deep elytral striae, which, towards the tips, are represented only by rows of punc 

 tures. 



E. caprella, elongatus, ater cinereo-pubescens, thorace latitudine longiore, antrorsum angus- 

 tato, lateribus antice rotundatis, sat dense punctato vix canaliculate ; elytris macula basali, 

 altera angulata ante medium, tertiaque rotundata ad dodrantem flavis, striis punctatis, inter 

 stitiis planis rugose punctatis, antennis articulis 2ndo et 3io aequalibus, pedibus testaceis. 

 Long. 25. 



Shoalwater Bay, Dr. Cooper. Very similar to E. stigmosus Lee., (Trans. Am. Phil. Soc. 

 10, 4T2,) but the strise of the elytra are not so deep, and the basal spot is not connected with 

 the angulated spot, which rises along the suture nearly to the scutel ; the posterior spot is 

 larger and more rounded ; the thorax is more distinctly narrowed anteriorly. Varieties were 

 found in which the basal and angulated spots are obsolete, or even entirely wanting. 



ADELOCERA Latr. 



A. aurorata. A specimen found at Steilacoom by Mr. Gibbs agrees in every respect with 

 the description made by me from the typical specimen found in New Hampshire by Dr. Harris ; 

 as I have not a specimen in my collection, I cannot assure myself of their identity by a direct 

 comparison. 



