94 BROOKLYN MUSEUM SCIENCE BULLETIN 3. 3. 
referred later by Mr. Arrow, wrote me that the specimen I labelled 
quadricollis differs from the type of cupraea. This species, however, 
varies a good deal like most of our North American species and with only 
two specimens at hand of different coloration and representing possibly 
the two sexes, the differences between the two may appear strong enough 
to consider them distinct. However, Mr. Arrow's remarks on the type 
of cupraea which he compared with siibtilis but with shorter prothorax, 
the latter and elytra more coarsely sculptured and in addition the pale 
legs leaves very little doubt that cupraea Kirby is the same as Say's 
quadricollis. 
The lateral margin of the elytra is in all our species well defined by 
a more or less distinct ridge separating the epipleurae from the elytra, 
and is in some species acute in its entire length or nearly so, or trans- 
versely rounded in others, and the marginal row of punctures is generally 
quite deeply impressed. In quadricollis and also in puhescens this 
elevated lateral margin is absent which separates them at once from all 
our species. Besides the more robust form, not pubescent prothorax 
and elytra, broader and occasionally coarsely punctate prothorax, quadri- 
collis has the elytral epipleurae wider than the last elytral interval; in 
puhescens both are of about the same width. In the rest of our species 
the elytral epipleurae are generally narrower than the last elytral interval. 
In puhicollis the elevated lateral margin is rather poorly defined but 
generally distinct in about basal half. 
DoNACiA RUGOSA Lec. 
Elongate, feebly depressed; color of upper surface cupreous, aeneous, 
metallic green or blue; antennal joints reddish, at apex more or less 
black, frequently all the joints are black or very nearly so; legs reddish, 
femora with or without apical metallic space; body below metallic, 
last ventral segment frequently more or less red. 
Head rather feebly constricted behind the eyes, which are rather 
large; median line deep; posteriorly not or feebly tuberculate; surface 
densely punctate-rugose; antennae elongate, extending beyond the 
middle of elytra, slightly shorter in the female, third joint much longer 
than second and about as long or longer than the first joint. 
Prothorax about one half wider than long at apex; sides narrower 
behind the lateral tubercles, more or less parallel or feebly diverging to 
base; anterior angles more or less distinctly oblique, generally rounded; 
posterior angles usually prominent; lateral tubercles occasionally feebly 
distinct, often absent; surface rather coarsely punctate, the punctures 
