46 AMERICAN COLEOPTEEA. 



vals vary from flat to feebly convex, especially the outer ones. The 

 legs are usually seneo-testaceous with the femora at apex and the 

 tarsi darker ; their color, however, varies to nearly seneo-piceous, with 

 the femora at base and the tibiae beneath paler. 



It is allied to lorquini and pimctatostriaturn by the straight fourth 

 stria of the elytra. 



The males appear to be much rarer than the females. 



It occurs in New Hampshire, Massachusetts (Springfield), New 

 York (Adirondack Mountains), Georgia, Ohio, Michigaii^ and the 

 Lake^ Su^rJQjL^region, the Hudson Bay Territory, Illinois, Wiscon- 

 sin, Arkansas, Oregon and Vancouver Island. At Port Arthur, on 

 the north shore of Lake Superior, I found it to be the most abundant 

 species of the group. 



7. B. lorquini Chaud. — Form broad, feebly convex ; color varying from 

 nearly black to dull bronze, or more rarely coppery. Head as wide as the thorax 

 at apex, alutaceo-granulate ; palpi piceous or seneo-piceous ; antennae nearly one- 

 half the length of the body, dark piceous or nearly black, the basal joints more 

 or less aeneous, the first rarely rufous. Prothorax distinctly wider than long, 

 slightly wider at base than apex, the surface more or less alutaceo-granulate, 

 slightly rugose at base, feebly transversely wrinkled along the median line; apex 

 nearly truncate; median line distinct, usually abbreviated before and behind; 

 anterior transverse impression nearly obsolete, the posterior distinct : basal im- 

 pressions moderately deep, unistriate ; sides very finely margined, slightly arcuate 

 in fi'ont, feebly sinuate behind ; hind angles subacute, not carinate. Elytra 

 nearly one-half wider than the thorax, oblong-ovate, rather finely striate, granu- 

 late with elevated smooth spaces, which are usually confined to the third interval ; 

 strise finely punctate, the fourth straight ; intervals nearly flat, the third with 

 the first fovea about the middle, the second about one-fourth from apex. Beneath 

 dark feneous, shining, the abdomen nearly black. Legs dark feneous, or nearly 

 black. Length .22-.28 inch ; 5.5-7 mm. 



This species varies in color and in the extent and coarseness of 

 the granulation, some specimens bearing a strong resemblance to 

 littorale. These may be at once distinguished by the straight fourth 

 stria of the elytra. From carimda it may be readily recognized by 

 the characters given above, while from pundatostr latum it differs by 

 the form of the thoi'ax, the less deeply striate elytra with the striae 

 more finely punctured, and the usually much less shining surface. 



Its range of distribution is more limited than that of the others 

 of this group. I have seen specimens from Colorado, AVyoming, 

 Montana, California, Oregon and British Columbia. It seems to be 

 confined to the region west of the Rocky Mountains. 



8. B. puiictatostriatiini Say. — Form robust, moderately convex ; color 

 bronzed, usually more or less coppery, rarely greenish or bluish, shining. Head 



