lOO BROOKLYN MUSEUM SCIENCE BULLETIN 3. 3. 
generally not rugose, but with more or less distinct fine punctures; the 
color bluish-green, blue, purple, black or cupreous; the first ventral 
segment of the males generally flattened, apparently never broadly 
depressed along middle. The punctuation and pubescence of the 
ventral segments and the elytral sculpture varies very little in the blue, 
purple or black specimens and can be taken as a guide in placing doubtful 
cupreous specimens. However, in a large series cupreous specimens will 
be found which are intermediate between typical hiimpressa and var. 
limonia. 
var. LIMONIA new variety. 
Differs from typical hiimpressa in having the first ventral segment, 
especially at middle, more densely and finely punctate, the punctures 
at middle often finer than those on the second segment, esp. in the males, 
pubescence short, but more distinctly visible at middle; prothorax 
generally wider esp. below the tubercle, and occasionally shorter, the 
sides more or less sinuate and feebly converging behind the lateral 
tubercle ; the punctuation is generally rather coarse, the punctures some- 
times more or less confluent; the intervals of the elytra are generally 
more finely rugose from base to apex than in the typical form ; the color 
is apparently always cupreous and the first ventral segment of the male 
is more or less distinctly depressed along the middle. 
The type is a male from Indian Pass, N. Y., and the allotype a female 
from Van Cortlandt Park, N. Y. 
New York: Ithaca, May; Concord, May; Indian Pass, July (Ouirsfeldt) ; 
Van Cortlandt Park (Schaeffer). 
Massachusetts: Framingham, May (Frost); Southboro, May (Frost). 
New Hampshire: Claremont, July (Engelhardt). 
Maine: Wales, June (Frost). 
Michigan: Livingston Co., May (Hatch). 
This variety is much more variable than the typical form in regard to 
the elytral sculpture, punctuation of the ventral segments and form of 
prothorax. A few specimens from Livingston Co., Michigan, are very 
close to porosicollis in the form of prothorax and having the elytral 
intervals and the ventral segments as finely and densely sculptured as 
in certain specimens of that species. Both porosicollis and hiimpressa 
were taken at the same time in that locality. They possibly interbreed 
and these troublesome specimens are apparently hybrids of the two species. 
From allied species hiimpressa and its variety limonia will be readily 
known by its small eyes, relatively wider neck, absence of coarse rugae 
