AMERICAN COLEOPTERA. 33 



Specimens in my cabinet are from Pennsylvania, Iowa and Canada 

 West, the latter through the kindness of Mr. Johnson Pettit. 



H. fastigiatus, Say (Parnus), Long's Exped. II, 275 ; basalis Lee, Proc. Ac. loc. 

 cit. 

 The basal region of the prothorax is rather suddenly depressed, 

 smooth, shining and entirely without pubescence. The sides of the 

 elytra are densely pubescent while a sutural space is quite smooth and 

 with but few hairs. This space is broader at the base, gradually nar- 

 rowing to the middle of the elytra, then widening, and forming an 

 oval space not reaching the tip. All the numerous specimens before 

 me exhibit this, and, in confirmation of the fact that the absence of 

 hairs is here not accidental, there are very few punctures and the sur- 

 face is quite shining. The last abdominal segment is as in the prece- 

 ding species but less ferruginous. Length .20 — .22 inch ; 5—5.5 mm. 



Occurs from Canada to the District of Columbia and Illinois. 

 H. striatus. Lee. Proc. Acad. 1852, 4^;foveaius Lee. loc. cit. 



The latter species does not appear to have any definite character by 

 which it can be separated. The unique specimen on which it is 

 founded has not the alternation of the interspaces as well defined, and 

 is, moreover, slightly more elongate. But I am persuaded to overlook 

 these variations from the fact of still greater deviation occurring in 

 2irodnctus, with, however, intermediate forms uniting them. Speci- 

 mens have been sent me by Mr. Jas. Behrens from the neighborhood 

 of San Francisco, which cannot be separated from the true type. This 

 species may be known by the alternate interspace being more elevated- 

 Length .22— .24 inch j 5.5 — 6 mm. 



Not abundant in the Eastern States and Canada, but greater num- 

 bers prevail in the Western States. The California specimens have 

 been received in abundance, and, judging from my experience in col- 

 lecting productus, when found occur in countless numbers. 1 have 

 seen several hundred on a stone not more than four inches square. 

 H. suturalis. Lee. Proc. Acad. loc. cit.; gilensis Lee. loc cit.,- (xqualis Lee. Proc. 

 Acad. 1S54, p. 81. 



These three species were founded on unique specimens from widely 

 separated regions. Collections made by myself and others in Califor- 

 nia and Arizona demonstrate the fact that these should all be united, as 

 a perfect series, including the types, can now be formed. The sutural 

 elytral space in specimens devoid of incrustati<in. has the hairs rather 

 more sparsely placed and paler in color; the form of the space being 

 similar to that described in fastigiatus. The thorax is, however, 



TRAXS. AMEK. EST. SOC. (5) FEBRUARY, 1870. 



