OF mi. I'M ri.n STATES. 1 1 1 



Diacanlhus sticticus and russicolli s, ( rerm. I Zeitschr., I. T I.) Beem to be closely 

 related to this species, but must be different: the former has the thorax Blightly rounded 

 on the sides; the latter has the thorax and feet rufous, and the thorax strong!} rounded 



on t! 



Eiater r ubricollis Say, (Journ. Acad. 3, 177,) quoted by Gcrmnr, under his D. rus- 

 sicollis, is in reality Herbst's species of the Barae name, and will be found under Elatei 

 r ubricollis of the present essaj . 



20. ('. aulcicollia, elongatus, parallelus, nigro-piceus, glaber, thorace antice Bublatiore htitu- 

 ili'io fere sesqui longiore, lateri tis, apice breviter rotundatis, minus convexo, oonfertim puno- 

 tato, profutnle canaliculato, angnlis posticia acutis, elytris apice rotundatim attenuatis, Btriia ; 

 interstitiis modice convexia, punctulatia, epipleuria pedibuaque piceo-rufia. 1. ing. '55— '6. 



El ! | Say, Ann. Lye. !, 256. 



- . Trans. Am. Phil. Soc. 6, 168. 



Middle and Southern States, rare The joints <d" the antennas are moderately dil 

 and diminish gradually in length from the fourth. 



A.—:;. 



21. C. nnbilipennis, elongatus linearis, m pallide pubescens, uiger, fronte Bubconcava, thori 

 latitudine longiore, antroraura vi\ angustato, lateribus paulo rotundatis, minus dense punctat ■ 

 canaliculato, elytria pa mctatis, interstitiis disperse pu 



ct ad medium infuscatis. Lon '. ■•' I. 



One specimen from Oregon, Col. M'Call. The posterior angles of the thorax are long 

 and acute; the third joint of the antennae i- equal in length to tin' fourth, but i~ not at all 

 dilated. The last joint is wanting, so ili.n we cannol be certain thai it belongs to this 

 division; its general appearance, however, prevents il from I >« i tur placed in nn\ other. 

 The front i- slightly concave, not showing the quadrate outline which may be perci ived 

 in the others <>\ this group. 



-. C. serariu . . rapra glaber, splendide viridiaureus, thorace latitudine long 



sum subai indatia, sat dense lateribus oonfertim punctato, cupreo-mar- 



ginato, poatice subcanaliculato, elytris Btriia punctatis, interstitiis parce subtiliter punctulat 

 nis nigria, art aon dilat i : '56. 



I Randall, Bost. Journ. Mat. II • . 2, T. 



Eiater R I \| ,_-. de Zoologie, 1 B52. 



Lake Superior, Maine, Newfoundland. This must bo ver) similar to C. rcsplendens, 



1 •■ mi. Zeitschr. I. 60,) which, however, must have the third joint of the antennae dilated. 



In my catalogue of Lake Superior Coleoptera, I have placed them as Bynonyraous, but, 



until comparisons ar<' made, they musl be considered as distinct The front in this 



species is not Blightly concave as in the preceding, but flattened, not quit bo straight 



along the anterior part, where the declivity commences, as in the next two b| -. but 



iwing a tendenc) to become quadrangular; the antennae <>\ both ngl) 



-i Trail'. 



V arieties occur ol a golden i opper, and also of a bluish gn • lour. 



