CODLING MOTH IN COLORADO. 



107 



Table LXXVIII. — Deposition of infertile codling moth eggs, Grand Junction, 

 Colo., 1915 (30 female moths emerged July 15). 



Number 



Date of 



Number 



Date of 



of eggs 



deposi- 



of dead 



death of 



deposited. 



tion. 



moths. 



moths. 



2 



July 18 



1 



July 21 



3 



19 



3 



23 



30 



20 



5 



24 



16 



21 



1 



25 



8 



22 



3 



26 



42 



23 



1 



27 



31 



24 



2 



28 



4 



26 



1 



29 



40 



27 



3 



30 



6 



28 



2 



31 



12 



29 



2 



Aug. 1 



35 



30 



1 



2 



3 



Aug. 1 



3 



3 







1 



4 







1 



5 



232 



30 





TIME REQUIRED FOR CODLING-MOTH LARVA TO LEAVE THE EGG. 



The following notes were made July 30, 1915, on the time re- 

 quired for a codling-moth larva to leave the egg. 



Egg No. 1. — At 1.10 p. m. there was a small rent in the chorion 

 and at 1.50 p. m. the larva had completely left the eggshell. 



Egg No. 2. — At 1.15 p. m. the larva had cut a small opening in the 

 eggshell, and had hatched by 1.23 p. m. 



Egg No. 3. — At 1.20 p. m. the larva was found moving its body 

 and mandibles intermittently until 2.03 p. m. It hatched at 2.06 p. m. 



Egg No. 4- — The eggshell was found slightly opened at 2.09 p. m. 

 The larva hatched at 2.13 p. m. 



Egg No. 5. — This egg was slightly open at 2.18 p. m., and although 

 the larva made repeated attempts to extricate itself it did not ac- 

 complish its task until 2.55 p. m. 



As previously stated, the codling-moth larva normally tears a 

 small opening in the eggshell by means of its mandibles and then 

 passes out of the shell head foremost. 



LARVJE THAT FAIL TO EXTRICATE THEMSELVES FROM THE CHORION. 



On several occasions larvae were found dead after having par- 

 tially extricated themselves from the chorion. In these instances 

 it was noted that the anal end was protruding through the cut in 

 the eggshell, but that the larva was held from freeing itself on ac- 

 count of the cervical shield and head, which were too large to pass 

 through the opening. Normally, as previously mentioned, the larva 

 tears a slit in the eggshell by means of its mandibles and then passes 

 head first through the rent. 



