87 
ously injured, and the quality of the fruit correspondingly affected. 
The brown pupa is formed within the fold, and in time changes to 
a small miller (Fig. 22, c) about two-fifths of an inch across the 
spread wings, the front wings red-brown, marked with white lines 
and spots, the hind wings dark gray. 
Fig-. 22. Strawberry Leaf-roller, Ancylis 
comptana: a, larva, natural size; 6, head and 
fore part of larva, seen from above; c, adult 
moth; rf, posterior end of larva seen from above. 
As we lack exact information concerning the number of genera- 
tions and other details of the life history of this insect, experiments 
and observations on this subject were made in the fall of 1905 and 
during 1906 by Mr. J. J. Davis, an assistant of this office. Table I 
tabulates the life history data obtained by him, starting with the 
first brood in spring and tracing the appearance and period, in days, 
of the successive stages of the four broods thruout the season, as 
they appeared in tlie different years, using a separate line for each 
brood of each year. 
TABLE I 
Broods 
Eggs first 
noticed 
Rgg 
period 
Larva? be- 
gan hatching 
Larval 
period 
Pupation 
occurred 
Pupal 
period 
Adults 
emerged 
IV, '05 
(Larvae col- 
lected Aug. 1) 
Aug. 3-17 
^26 examples) 
Mean. Aug. 7 
8 days. 
(2 
exam.) 
Aug. 12-16 
(11 examples) 
Mean, Aug. 14 
I, 'O.0 
— 06 
Aug. 19 (from 
adults emerg- 
ing Aug. Ifi) 
6 
days 
Aug. 25 
(Larvffi col- 
lected Aug. 31 
winter 
(died) 
April 21-25 
(?) 
May 2 
II, '06 
May 2-4 
9-10 
days 
May 13 
21-29 
days 
June 3-23 
(Pups collect- 
ed June 16.) 
9.6 da. 
10+ 
days 
Jun. 11?-Jul. 1 
June 18-36 
III, '06 
June 33 
6 
days 
June 29 
20-24 
days 
July 19-23 
6-10 da. 
Mean. 
7.5 da. 
July 25-31 
IV, '06 
July 28 
5-6 
days 
Aug. 2-3 
16-20 
days 
Aug. 18-2i 
(13 examples) 
Mean, Aug. 20 
6-8 da. 
Mean, 
6.7 da. 
Aug. 24-29 
I, '06 
an 
fall) 
Aug. 31 
5 
days 
Sept. 4 
winter 
It will be noticed that Davis collected in the field larvse of the 
last (fourth) brood August i, 1905. These pupated August 3-17 
and the adults began to emerge August 12. August 16, two 
emerged, a total of 11 in all, and these tW'O and the remaining 
pupai were transferred to another breeding cage. Eggs were no- 
ticed in this cage August 19, and larvse hatched from them August 
25, but subsequently died. Fresh larv?e w^ere then collected in the 
