10 BULLETIN 599, U. S. DEPARTMENT OF AGRICULTURE. 
OVIPOSITION OF FiIRst-Broop Morus. 
Taste VIII.—Oviposition of first-brood moths of the striped peach worm at 
Benton Harbor, Mich., 1915. 
Date of Number Date of Number 
oviposition. of eggs. oviposition. of eggs. 
178 AvigGi Syst 2.8. S52 13 
20 ||| PACT onl O eeepeers ae eae 10 
10 —_ — 
Rotale ses. 237 
It will be seen from Table VIII that eggs were being deposited 
from August 15 until August 19, with the greatest number on August 
15. The oviposition records are from the moths recorded in Table 
VII; the late emerging moths failed to oviposit. On the morning of 
August 19, in transferring a peach on which eggs had been depos- 
ited, by mistake one moth was transferred. When the condition of 
the eggs was observed on the morning of August 23 the moth had 
deposited 42 eggs in addition to those previously recorded. 
SECOND BROOD. 
° INCUBATION PERIOD OF SECOND-Broop Eacs. 
TasLE IX.—IJncubation period of second-brood eggs of the striped peach worm 
at Benton Harbor, Mich., 1915. 
Date of ovi- Number | Date of | Number Egg 
position. 1 ofeggs. | hatching.| oflarvee.| stage. 
Days. 
ANDES iene aesioe, 26 | Aug. 31 14 15 
Bae MSS Sept. 2 16 
Sau etuen Ss Sept. 2 3 17 
access Sept. 3 1 18 
Seah oes Sept. 5 4 21 
IAT PN aes ae ee 11 | Sept. 1 5 15 
INES IEE Sn 13 | Sept. 2 8 15 
lathe none Se Sept. 3 1 16 
Aug. 19..... 17 | Sept. 3 17 15 
Total... GTi Sees Bee BD). |icatrretcreerere 
Maximum length of incubation period.._._.. days.. 21 
Minimum length of incubation period.....__- doseeeald 
Average length of incubation period.......... do.... 15.6 
In Table TX it will be seen that eggs began to hatch on August 31 
and continued to hatch until September 3; the average incubation 
period being 15.6 days. : 
THE EMERGENCE OF THE LARVA FROM THE EGG. 
The larva cuts the top of the eggshell with its mandibles and eats 
the part cut away. By a wriggling movement it forces its head and 
thoracic legs out of the shell and with these legs on the edge of the 
shell pushes the rest of the body out by the use of the caudal part 
of the abdomen. Of four individuals observed, 13 minutes was con- 
