32 
it. Thio is repented until it is entirely within the burrow, when it 
tui/js around and spins a silken net over the hole, in which may be 
incorporated several pieces of the fruit. (PI. IV, fig. 1.) 
Slingerland, Card, and Cordley have also noted these larvae enter, 
and the observations made by the writer agree entirely with theirs. 
One of the essential points noted is that Avhile entering none of the 
larv83 seem to eat any of the fruit until well within the burrow, and 
it most probabh^ gets some of the poison applied in spraying when 
it attempts to pierce the skin. The writer has observed numerous 
larger larvie, and is quite positive that they do not eat any of the fruit 
while they are entering. 
PLACES OF ENTRANCE. 
The places of entrance of the successive broods are quite different. 
Various authors have stated that from (>() to 80 per cent of the larvi^ 
of the lirst generation enter the fruit bj^ the calyx. In IDOl several 
countings gave an average of 83 per cent, with a minimum of 79 per 
cent. In 190'2 much more extensive countings gave a maximum of 
93 per cent, a minimimi of 50 per cent, and an average of 81 per cent. 
(Table III.) Less than one-half of 1 per cent enter ))y the stem end, 
while the larger remaining percentage enter the side, especially where 
fruits touch. 
The majority of the second generation enter the side of the fruit. 
A few counts in 1901 showed that the greater part of the larv» entered 
the side, and a few cases showed that from 90 to 100 per cent had 
entered at that place. Countings on 1,478 apples in September, 1902, 
on both sprayed and unsprayed trees, are given in Table III. 
Table III. — Percentage of first generation entering calyx. 
SPRAYED TREES. 
Orchard. 
Variety. 
Date. 
Stem. 
Side. 
Calyx. 
Total. 
Per cent 
in calyx. 
McPherson 
Do 
Jonathan 
Ben Davis 
do 
July 18 
July 22 
July 19 



2 
2 
8 
2 
28 
8 
23 
30 
16 
91.8 
93.3 
D. Geckeler 
50 
Total 

12 
38 
69 
82.6 
UNSPRAYED TREES. 
J D Gray 
July 17 
July 19 
July 21 
.Tnly 25 
July 22 
July 31 
2 



S 
31 
38 
4 
7 
21 
67 
62 
23 
23 
236 
13 
100 
100 
27 
30 
257 
15 
67 
bo . . .. 
62 
Do 
85.1 
Do 
76.6 
Dr. Collister 
Wealthy 
91.8 
McClellan 
86.6 
Total 
2 
103 
424 
529 
80.1 
