27 . 
destroys the whole first crop of leaves on nearly every tree in the val- 
ley. April 30, 1891, nearly every cottonwood presented a thoroughly 
blistered appearance, caused by the inside of almost every leaf on the 
tree having been entirely caten out, leaving the blistered-like skins 
of the leaves alone on the trees. This appearance continued for a couple 
of weeks until the trees gradually put forth a whole new crop of leaves. 
The second crop of leaves was but little infested this year, though Iam 
told that in some years they also are nearly destroyed. I was unable 
to breed this miner. 
The vine-leaf hopper has been studied. Eggs deposited singly, last 
of April, beneath skin of leaf, marked by a minute globule of exuded 
sap. Hatched last of May or first of June. Kerosene emulsion on the 
young hoppers, diluted fifteen times, proved effective; I. X. L. com- 
pound only partially so. 
Owing to a misunderstanding of one of the names in this paper a 
slight discussion on the habits of Aleochara followed. 
Mr. Schwarz considered the larva of these beetles not to be true para- 
sites, but simply predatory. 
Mr. Fletcher had bred larve of this genus from puparia of the cab- 
bage maggot, in which no holes of egress or ingress could be discovered, 
and considered them to be true parasites. 
Mr. Schwarz said that Mr. Coquillett had noticed the larva of Aleo- 
chara enter the puparia of Anthomyia, and stated, moreover, that the 
beetle larva has no approach to the parasitic habitus. 
Mr. Southwick mentioned the occurrence of mites upon Scarites sub- 
terraneus. 
Mr, Webster mentioned the abundance of Uropoda americana at Co- 
lumbus, on Diabrotica and a large number of other insects. . 
Mr. Alwood and Mr. Atkinson spoke of the abundance of beetle 
mites in their localities. 
Mr. Smith read the following paper : 
NOTES ON BLACKBERRY BORERS AND GALL MAKERS. 
By JOHN B. SMITH, New Brunswick, N. J. 
Blackberries are raised in New Jersey on a very large scale, and 
near Hammonton, in Atlantic County, several hundreds of acres are 
devoted to this fruit. After many trials, the “Karly Wilson” was 
selected by growers as the most satisfactory variety for‘ size, flavor, 
date, and shipping qualities, and it forms the bulk of the crop. A few 
other varieties are raised to extend the season; but the ‘ Wilson” is 
the staple. Unfortunately it adds to its many excellent qualities that 
of extreme susceptibility to insect attack, and of all the varieties grown 
in New Jersey this only is killed down in a few years unless carefully 
looked after. 
