INSECTS INJURIOUS TO TIIE PLUM-TREE. 
’HE GREEN, CHESTNUT-BACKED PLUM CATERPIL¬ 
LAR. 
(Acronyda super arts, Guence.) 
Order of LEPIDOPTERA. Family of Noctuid^:. 
On the 18th of June I discovered upon a plum-tree, and at a 
istance from each other, two rather thick-bodied green caterpil- 
irs, with a broad chestnut stripe along the back, once inch long 
rhen extended, but usually a little shorter owing to their habit of 
umping up the anterior half of the body, whilst the head and 
osterior part remained upon the same level. When first observed, 
i the middle of the day, they were not feeding, but resting per- 
3 ctly motionless. I put them in a box and fed them with plum 
?aves. During my absence from home one of them escaped, 
’he other crept under a chip lying upon the earth with which the 
ottom of the box was covered, on the 23d of June, and inclosed 
:self in a thin cocoon mixed and covered with particles of earth, 
nd attached to the under side of the chip, in a manner very simi- 
ir to that of the Pear Caterpillars described on a preceding page. 
On the first of July I found upon another plum tree, a much 
mailer, less than half grown individual of the same species, hav- 
Qg a small Ichneumonideous cocoon attached crosswise to the un- 
er side of its body, just in front of the anal prolegs. The para- 
itic Ichneumon-flv emerged from this cocoon on the 10th of July. 
On the same day, (July 10th,) the first mentioned caterpillar 
merged from its cocoon, in the form of a gray and white moth, 
ielonging to the genus Acronyda , and very similar to, if not iden- 
ical with the species named at the head of this article. It is a 
