March, 1910.] Fall : Chrysobothris Californica, etc. 51 



C. breviloba, new species. 



Similar in form, size, sculpture and color of upper surface to carinipennis, 

 from which it differs most essentially in the modification of the anterior 

 tibiae in the male. The apical dilatation is here as wide as long, constituting 

 about one fifth the length of the tibia, which is typically deeply sinuate above 

 the dilatation. The color of the under surface is dark bronze or cupreous, 

 with at most faint greenish reflections along the ventral sutures ; prosternum 

 with a faint incipient lobe in front, densely punctate and hairy in the male, 

 more sparsely punctate, more convex and less hairy in the female as usual. 

 The smooth areas of the prothorax are well defined, those of the elytra 

 numerous but not large, well defined and contrasting sharply with the 

 densely punctate areas ; the pygidium is moderately closely punctate in the 

 male, densely so in the female. In carinipennis the color beneath is typically 

 brilliant green throughout, but is bronzed in some examples (unless perchance 

 these are representatives of a closely allied species which we have not yet 

 been able to separate), the prosternum is not evidently lobed, thinly hairy, and 

 sparsely punctate or smooth along the median line, even in the male, a quite 

 unusual character ; the smooth areas of the upper surface are everywhere 

 smaller or less sharply defined, the pygidium rather finely and quite sparsely 

 punctate in the male, more closely so in the female. In the series of breviloba 

 at hand the length varies from 9.8 to 12 mm. ; width from 4 to 4.8 mm. 



As compared with monticola, breviloba is a distinctly smaller 

 species, the eyes less approximate on the vertex, their distance apart 

 being evidently greater than the maximum width of the eye, and 

 about equal to half their distance apart at the middle of the front; 

 the smooth areas of the elytra relatively numerous (only about five 

 or six in number on the disk in monticola) , the sutural interval with 

 alternating smooth and punctured spaces (punctate throughout or 

 nearly so in monticola), prosternum less evidently lobed in front; 

 dilatation of both front and middle tibije of different form. 



The series of breviloba before me comprises six males and four 

 females, all from Colorado (Glenwood Springs, Buena Vista, Boulder, 

 Florissant, Canon City). 



In a few males the sinuation of the front tibia is less deep than 

 in the typical form, the dilatation however being of the same shape; 

 these may possibly prove distinct, but I am tmable to characterize 

 them distinctly with the few specimens at hand. 



C. monticola, new species. 



Moderately elongate, subdepressed, black, punctured areas cupreous, 

 beneath bronzed or cupreous, lateral callosities of abdomen purplish. An- 

 tennae more slender externally, greenish or cupreous in the male, darker 



