152 BROOKLYN MUSEUM SCIENCE BULLETIN 3. 3. 
or cupreous, but bright green, pale bluish-green and golden specimens 
occur occasionally. 
Iowa: Lake Okoboji, June (Buchanan). 
Kansas: Douglas Co. (Snow in coll. Corn. Univ.). 
Wyoming: Como. (O. Dietz coll.). 
North Dakota: Minot, Ward Co., June (Notman). 
Ontario: "Ont." 
Manitoba: St. Notbert, Winnipeg and Miami, June (Wallis). 
Alberta: Medicine Hat, June (Carr). 
Washington: "Wash." (coll. O. Dietz). 
California: "Cal." (coll. O. Dietz). 
The last two localities are open to doubt, each represented by a 
single specimen only. 
The typical specimens of this form from Wyoming are rather large 
and robust, but specimens from other localities are slightly narrower 
and some smaller. They all have the prothorax wider and the legs, 
including the femora, entirely pale. The antennae are generally stouter 
than in the typical form, but a few specimens have the joints more 
elongate. The sculpture of the upper and underside of prothorax is 
also generally coarser. 
D. pusilla and varieties have the second and third antennal joints 
very small, usually equal, and the outer joints generally stouter than in 
the allied species, the prothorax densely punctate-rugose and usually 
without impressed median line and lateral tubercles rather indistinct; 
the side pieces of prosternum rugose or vermiculate-rugose anteriorly 
and rather feebly strigate-rugose posteriorly, the lateral margin of elytra 
generally evenly acute from base to apex and the ante-median and post- 
median elytral indentations generally distinct and often deeply impressed. 
D. rugifrons Newm. is a synonym of pusilla and not of emarginata 
as the latter species has never bicolored hind femora. Unfortunately 
Mr. Arrow could not locate the type in the British Museum but the 
description agrees better with pvisilla than with any other species found 
in the same region. 
DoNACiA DUBiA new species. 
Moderately elongate; color of upper surface bronze, cupreous 
or metallic green; antennae red at base, black at apex, except the first 
joint which is as usual metallic; legs metallic, femora, tibiae and tarsi 
at base more or less rufous; below metallic. 
Head distinctly prolonged, truncate and distinctly constricted 
