ARTICLE II.—ON A FEW GRAPE INSECTS. 
1. Petrophora diversilineata , Hiibn. 
insect, well known as injurious to the grape, has here- 
been considered single brooded (except possibly in extreme 
m latitudes) and supposed to winter in the larval stage, but 
nervation made last year indicates that it is double brooded 
kthern Illinois. 
/sb collected on the grape in Union county, September 13, 
were found in the imago stage in the breeding cage February 
5, although the date of their appearance is not known. In 
ickard’s Monograph of the Phalsenidae of North America, the 
ence of the imago is recorded in New York and Massachusetts 
July 3 to August 17, and our autumnal larvae must conse- 
y have been the descendants of that brood. 
I' 
2. The Vine- loving Fruit Fly. 
(Drosophila ampelophila, Loew.) 
Order Diptera. Family DROsoPHiLiDiE. 
(Plate IX. Figs. 1-3.) 
n Mr. A. Williams, of Moline, Illinois, I received, October 10, 
3h of grapes containing great numbers of a white footless 
t by which most of the berries had been hollowed out, with 
formation that this insect was making havoc with most of the 
in his vicinity. These specimens were bred and yielded great 
ts of the above common pomace fly—one of the most abun- 
pecies in orchards in autumn, when the fallen fruit is rotting 
i )he ground. This fly likewise swarms around cider mills, the 
breeding in vast numbers in the pomace. 
later note Mr. Williams remarks: “This maggot has nearly 
the entire crop in this locality. It began on the vines about 
ears ago.” 
species, first described in 1862 by Loew, has been sev- 
imes noticed by economic entomogists,—chiefly by Lintner 
Comstock, the former of whom published an article 
( it in his first report as State Entomologist of New 
