112 



punctured and somewhat uneven. The elytra are broader than the 

 thorax ; they commence to taper a little behind the middle and are 

 narrowed backward roundly and rather acutely; on each wing-case 

 are two irregularly, oblong, impressed, transverse spots, which are 

 generally of a deeper green or copper color than the surrounding sur- 

 face — these sometimes appear double. The whole upper surface of 

 the insect appears as if it had been sprinkled with an ash-colored 

 powder. The under side and limbs are of a brilliant copper lustre ; 

 the feet bright green. Length about half an inch, but there is con- 

 siderable variation in size, which has given rise to a number of speci- 

 fic names for what are now supposed to be only varieties of this 

 species. 



CHALCOPHORA VIRGINIENSI8 — Drill'V. 



The generic characters which distinguish it are: Meso-sternum 

 and meta-sternum united without suture ; first joint of the hind tarsi 

 as long as the second and third united ; thorax sub-quadrate, sides less 

 rounded than in the preceding. The specific : upper side of the body 

 roughly punctured ; top of the head deeply indented; three smooth 

 raised black lines on the thorax; general color brassy or copper; on 

 each wing-case are two small impressed spots, a long, elevated black 

 line near the outer margin, another near the inner margin, with sev- 

 eral short lines of the same kind between them. 



Length from four-fifths to one inch or a little over ; width a little 

 less than one-third the length. 



The larva is the pine tree borer. 



dicerca divaricata. (The Cherry-tree Borer.) 



This is of a bright coppery or brassy color throughout, with a fVw 

 small oblong raised black points on the wing-cases; the head and 

 thorax are somewhat roughened or granulate ; the wing-cases are 

 elongate, tapering much behind and suddenly cut off at the tips 

 where the two cases are separated or parted from each other. The 

 length varies from seven to nine-tenths of an inch, width about three- 

 tenths the length. 



The larvae, so far as I am aware, have not been described, nor have 

 I had an opportunity of examining them; but we may reasonably pre- 

 sume they are similar in form to those of the C. femorata just de- 

 scribed. Their attacks appear to be directed chiefly against the wild 

 and cultivated cherry-trees. They are also found occasionally boring 

 into the peach-tree, and, Dr. LeConte adds, the beech. 



The perfect insects are to be found from .Tune to August, basking in 

 the sunshine on the limbs of these trees. 



Spec. char. Imago. — Of a shining bronze or copper color throughout, 

 rather deeper beneath than above ; head and thorax coarsely punc- 

 tured so as to give them a granulated appearance; the thorax is 

 slighly furrowed in the middle ; posterior lateral angles acute. 

 Elytra striate, marked with some oblong black dots, arranged some- 

 what in lines ; elongate, acuminate posteriorly, the extreme points 

 truncate and separating from each other. The breast is furrowed, 

 and the males are furnished with a little tooth on the under side of 

 the middle tibiae. The length varies from seven to nine-tenths of an 

 inch ; width about three-tenths of the length. 



