28 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 
apparently bored down the twigs until they encountered wood too 
hard for them to chew, when they left the burrows and were lost. 
In the laboratory four larve just hatched were put on foliage 
May 7. The ends of the twigs were stuck into a bottle of water, 
cotton was stuffed around the neck of the bottle, and the whole put 
under a bell jar. Two larvee were working May 12. On May 23 
one larva was still feedmg. It had begun work on a leaf, then it 
bored into the midrib and through the petiole into the end of the 
twig. The larva was transferred to a fresh twig, and when again 
examined, May 29, had burrowed for a distance of 1} inches. Then 
it had left the burrow, and forcing its way through the cotton at the 
neck of the bottle had drowned itself therein. It had reached a 
length of 9.5 millimeters and appeared to have passed the fifth molt. 
LARVZ IN PEACHES. 
Two peaches containing codling-moth larve were collected in the 
orchard, on trees adjoining an apple orchard. Both peaches ripened 
several days before the larve left them. One larva issued July 28 
from a peach collected July 10. The adult emerged August 10. 
Another peach collected July 29 gave out a larva on August 2, from 
which the adult emerged August 16. 
NUMEROUS LARVA IN ONE APPLE. 
Throughout the season, and also in 1907, it was noticed that when 
large numbers of young larve were allowed to enter a single apple 
at the same time, only a few survived. If larve being reared from 
egos laid in cages were not transferred to separate fruits within three 
to five days after hatching, or before their burrows reached the core, 
only a small proportion of the number entering could be accounted 
for. 
Some third-brood larve entering fruit in cages were left undis- 
turbed, the apples being kept in jars out of doors. The results, 
given in Table XXXIV, show that more than one larva is not likely 
to reach maturity in a single fruit at the same time. 
TasLE XXXIV.—Record of maturing larve from 4 apples, each infested at the same 
time by numerous larve. 
Numnt Larve formed 
umber cocoons. 
Eggs of larve Number 
hatched. | entering |}————_ ‘maturing 
apple. | Date. | Number. | 
Aug. 14.. 18 Sept 5 1 1 
Sept. 5; 
spun co- 1 
Do..... a coon in 1 } 2 
fruit. | 
Sept. 14..| 18 Oct. 20 1 | 1 
Doweas 8 Jee GOm eee 1 1 
