194 HEM IPX ERA. 



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, QHemipte- 

 ra Jiotnojjtera,^ in w^hich 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, but, 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. (Ilemiptera heteroptera.) 



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 ; 

 but, 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- 

 ficiently 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 De 

 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 nq/ator, the 

 latter word signifying one who wrinkles, which was probably 



