8 BULLETIN 598, U. S. DEPARTMENT OF AGRICULTURE, 
TABLE II.—Time of cmergence of adults of the hickory tiger-moth at North 
East, Pa., 1916. 
Total | Number | Number Total | Number | Number 
Date of emergence. | number of of Date of emergence. | number te) of 
of moths.| males. | females. ofmoths.| males. | females. 
MUNOW Oe seiaieien so 1 a BS cea. ao AMINE 1G Fe so oceeeeae Dil tisictwaeieias 1 
On SATS 1 A Bee Seeece cleo Locmtee eects 1 1 
ONS ea ere 4 3 1 22 ee TIRES 3 d )psehcesh: 1 
Eee pete 8 7 1 DABS Saeces cee os Be ae 1 
1h Saas Goce & 3 1 
i oesdaodre 3 2 1 Totalecss- ee 25 17 8 
LENGTH OF EGG STAGE. 
The length of the egg stage, based on records from 4 egg masses 
deposited in 1916, was 15 to 16 days. Two masses of eggs deposited 
June 15 hatched July 1; one mass deposited the same day hatched 
July 2; the fourth mass, deposited June 16, hatched July 3. 
DURATION OF LARVAL FEEDING PERIOD. 
The duration of the larval feeding period varies greatly. Miss 
Soule (8) records rearing one colony from egg to cocoon in 47 
days, which passed through only 7 instars. During the season of 
1915 larvee reared by the writer on Japanese walnut required from 
62 to 85 days from egg to cocoon, averaging 74.73 days. (See 
Table II.) 
Table IIl.—Duration of the larval feeding period, North Hast, Pa., 1915. 
Duration Duration Duration 
Number of} _ of larval Number of | of larval Number of | of larval 
individuals.) feeding individuals.| feeding individuals.| feeding 
"period. period. period. 
Days. Davrs. Days. 
1 62 1 72 2 7 
1 €4 2 74 2 80 
1 66 1 78 1 82 
1 68 2 76 1 85 
1 70 1 7 |———c—_jqcx 
1 71 3 78 22 174.73 
1 Average. ~ 
During the season of 1916 larve reared on the same food plant 
required 80 to 100 days, averaging 89.04 days. (See Table IV.) 
TasLE I1V.—Duration of the larval feeding period, North East, Pa., 1916. 
Duration Duration Duration 
Number of| of larval Number of} of larval Number of} of larval 
larve. feeding larve. feeding larve. feeding 
period. period. period. 
Days. Davs. Days. 
3 80 15 88 2 94 
2 82 31 89 2 95 
4 83 26 90 1 96. 
9 S &4 4 91 1 100 
6 85 6 o2 — 
21 86 8 93 145 1 §9. 04 
4 87 
1 Average. 
