34 BULLETIN 911, IT. S. DEPARTMENT OF AGRICULTURE. 
growers. During these investigations thF writer has been led to 
believe that the moths normally prefer to deposit their eggs on the 
formed grapes rather than on the unopened buds. This was strik- 
ingly shown in the case of the Clinton vine on which oviposition 
records were taken for Table XIY. On this single Clinton vine, growing 
in a row of the Concord variety with the Ives variety close by. were 
994 grapes bearing eggs on June 29. Subsequently 630 more eggs 
were recorded on this one vine. Careful search was made on adjoining 
vines of the other varieties and not until the grapes were well formed 
could eggs be found, whereas heavy oviposition continued on the Clin- 
ton vine. Repeatedly vines of the Shrides variety, the earliest of any 
to bloom in northern Ohio,- have been heavily infested with larva? 
when adjoining vines of the Concord and Catawba varieties bore no 
eggs and were not infested. This condition also prevailed where 
several rows of the Clinton or other early blooming varieties paralleled 
rows of the later blooming varieties. In years of heavy infestation 
it is advisable to spray the early blooming varieties earlier than the 
midseason varieties. 
EGG. 
A single observation was made on the issuance of the larva from 
the egg. on August 9. 1916. When first observed, the head of the 
larva was just through the eggshell and 2^ minutes more were required 
for the larva to free itself entirely from the shell. The larva did not 
consume the emptv eggshell, 
LARVA. 
Mention is often made of the habit of the first-brood larva? to web 
the yoimg grape clusters before or during bloom. In but one instance 
during three seasons has the writer seen these webbed clusters in the 
grapes of the mid-season bloo min g period. Webbing frequently 
occurs in the Delaware variety which is in full bloom a few days 
after the Concords and just at the time when the spring-brood moths 
are emerging in large numbers, as shown in figures 2 and 4. This same 
condition exists with the Xorton variety, which blooms very late. 
The grape-berry moth larva? occasionally feed on grape leaves in 
the rearing cages even when grapes are present, and in at least one 
case a larva developed from about one-half size to maturity by feeding 
in this way. 
LARY.E FEEDING OX PHYLLOXERA GALLS. 
On August 25. 1916. and again on October 2. 1917. vines of the 
Clinton variety of grape were observed which were heavily infested 
by the leaf form of the grape phylloxera. Examination of the 
phylloxera galls showed that they had been eaten into and in some 
cases much of the gall actually consumed. On these same leaves 
with the galls were thin white silken webs containing larva? which 
