AMERICAN COLEOPTERA. 395 



H. tartarieus, Lee. Lake Sup., p. 214; nigellus, Mann. Bull. Mosc., 1853. 

 The only specimen of H. tartarieus, shows very little trace of pubes- 

 cence, but this is probably due to abrasion. 



H. caliginostlS, Lee. Lake Sup., p. 214; puberulus, Lee. 1. c. p. 214. 

 Distinct by the thorax with the sides rounded, hind angles obtuse. 

 9 opaque. This does not appear to be the //". melanocephahis of 



Europe. 



H. tristis, Payk. F. S. ; varians, Lee. Lake Sup., p. 214: ruficapillaris, 

 Mann. I. e. 



Nearly glabrous, finely punctulate. Found all along the Arctic 

 Region. 



H. subtonsus, Lee. Pr. Acad., 1855, p. 292, 47. 



Differs bv its more apparent pubescence and broader form. Boston; 

 abundant. 



H. — Thorax broader than the elytra, sides rounded, rather strongly margined. 

 H. notabilis, Lee. Lake Sup., p. 216. 



Resembles H. modestus in sculpture, but is very distinct by the di- 

 lated thorax. 



I. — Thorax strongly margined, above glabrous, depressed, sparingly punctate. 

 H. COllaris, Lee. Proc. Phil., 1855, 292, 53.— Rather broad, sides parallel, 

 behind obtusely rounded, black, antennae, legs and upper side rufous, sub-de- 

 pressed, glabrous very sparsely punctate ; thorax short, transverse, very faintly 

 punctulate, thickly margined: elytra with the humeral angles not prominent, 

 sparsely punctate, with faint traces of the dorsal striae; body beneath very 

 sparingly punctate. L. -14 inch. 

 Lake Superior. 



H. persimilis, sp. n. — Very close to H. collaris, but longer, more parallel, 

 thorax smooth, elytra more sparingly punctate, without traces of the dorsal 

 striae, humeral angles less prominent. L. *15 inch. 

 Canada. (Horn.) 



H. oblittis, Aube, Spec. vi. — Also very near H. collaris, but shorter and a 

 little broader, thorax nearly smooth, elytra more sparingly and a little more 

 strongly punctate, dorsal series hardly visible. L. '13 — '14 inch. 

 Middle States. 



H. vilis, Lee. Ann. Lye. v., 208. — Ovate, rather depressed, sub-parallel, 

 rufo-testaeeous, beneath black: thorax short, disc nearly impunctate, sides 

 straight, rather strongly margined; elytra almost glabrous, very finely and 

 sparingly punctulate; underside sparingly punctate. L. -12 inch. 

 California, Oregon. 



