THE STRIPED PEACH WORM. 11 
sumed by each from the first cutting of the eggshell until the larva 
was entirely free. 
FEEDING PERIOD OF SECOND-BRooD LARVA. 
TABLE X.—Length of feeding period of second-brood larve of the striped peach 
worm at Benton Harbor, Mich., 1915. 
Date of | Number Days Date of | Number} Days 
Date of hatching. | cocoon- of of Date of hatching. | cocoon- of of 
ing. cocoons. | feeding. ing. cocoons. | feeding. 
7 10 45 Oct. 24 2 53 
9 14 47 Oct. 27 2 56 
12 1 50 Oct. 30 1 59 
15 1 53 Nov. 2 3 62 
24 1 62 Nov. 10 8 70 
30 1 68 Nov. 14 2 74 
9 4 39 Oct. 22 4 50 
12 2 42 Oct. 24 1 52 
24 11 54 Oct. 12 1 39 
12 2 4] Oct. 24 1 51 
22 8 51 
15 1 44e | ge) eLOtaleecs SA S| ee oe eck ee Col eae ene 
Maximumilene th oineedine perlod=--. 22.4: seeds esate ee eeee os fee sees aoe a days.. 74 
Manimumulenrth ofiesding Period =~ .--/=- 52.2 <ssea-c coe seen 2 seas aoe sees emacs do.... 39 
PAMer ace CHetniOnieeGine iD OLIOG </s cio) sik = eee Stas eee eee eee nae aes ee ne asapeee Gorgas o20L 
Larve were feeding from August 23 until November 14, the aver- 
age length of feeding period being 52.10 days. This late date of 
feeding is undoubtedly later than would have been possible in the 
field, for defoliation of peaches occurs previous to this date, al- 
though in the rearing jars the larve secured the foliage to the twigs 
by the silken webs in such a way that it could not drop. 
CocooNING OF SECOND-BRoop LARV2. 
Although cocooning normally takes place in the soil, 13 of 361 
individuals recorded pupated in the webbed foliage in which they 
had lived as larvee. These pupe were closely rolled in the individual 
leaves but not attached to them, and no cocoons were formed. The 
dates of cocooning are shown in Table X. 
SUMMARY OF SEASONAL-HISTORY STUDIES. 
Table XI shows a summary of the seasonal-history studies made 
on material in rearing cages during the seasons of 1915 and 1916. 
TABLE XI.— Summary of seasonal-history studies of the striped peach worm as 
observed by rearing during the seasons of 1915 and 1916. 
Number of days. 
Number 
Observation. Season.| ofindi- : i 
viduals. | 4 verage. ae Mink 
Length oflife of moths ofspring brood............-..-. 1916 20 10.6 28 4 
Incubation of eggs ot first brood...............-.------ 1915 118 13.18 19 10 
Feeding period of transforming larve of the first brood.| 1916 14 29.6 36 22 
Feeding period of wintering larve of the first brood ....| 1916 23 34.2 48 22 
Length of period in cocoon of first brood.........-..--- 1916 17 12.4 21 9 
Incubation of eggs of second brood.........--..-------- 1915 55 15.6 21 15 
Feeding period of second-brood larve..............---- 1915 81 52.1 74 39 
