194 
IIEMIPTERA. 
and the breast. Some of the insects belonging to this division 
live on animal, and others on vegetable juices. 
2. Harvest-flies, Plant-lice, and Bark-lice, ( Hemipte - 
ra homo pt. era,') in which the wing-covers are, as the scientific 
name implies, of one texture throughout, and are either en- 
tirely thin and transparent, like wings, or somewhat thicker 
and opaque ; they are not horizontal, and do not cross each 
other at their extremities, hut, together with the wings, are 
more or less inclined at the sides of the body, like the wing- 
covers of locusts ; the face is either vertical, or slopes oblique- 
ly under the body, so that the beak issues from the under 
side of the head close to the breast. All the insects in- 
cluded in this division live on vegetable juices. 
I. BUGS. (Hemiptera heteroplera.) 
The hemipterous insects belonging to this division are vari- 
ous kinds of bugs, properly so called, such as squash-bugs, 
bed-bugs, fruit-bugs, water-bugs, water-boatmen, and many 
others, for which there are no common names in our lan- 
guage. In my Catalogue of the Insects of Massachusetts, 
the scientific names of ninety-five native species are given ; 
hut, as the mere description of these insects, unaccompanied 
by any details respecting their economy and habits, would 
not interest the majority of readers, and as I am not suf- 
ficientlv prepared to furnish these details at present, I shall 
confine my remarks to two or three species only. 
The common squash-bug, Coreus tristis 
(Fig. 83), so well known for the injurious 
effects of its punctures on the leaves of 
squashes, is one of the most remarkable of 
these insects. It was first described by Do 
Geer, who gave it the specific name of tristis, 
from its sober color, which Gmelin unwar- 
rantably changed to moestus , having, however, 
the same meaning. Fabricius called it Coreus rugator , the 
latter word signifying one who wrinkles, which was probably 
