54 



Riley states that the larvix? of the first generation are most al)iinclaiit 

 about Jul}^ 8; Gillette, that this occurs in Grand Junction about July 

 15, at Denver July 21, and at Fort Collins July 25. 



MOTHS OF THE FIRST (JENERATION. 



Card found the first moths of this generation about July 2, Cord- 

 ley gives August 1 as the date for the first and September 15 for the 

 last. Gillette gives the following data: Grand Junction, Colo., first 

 July 28, last September 12; Canyon City, first July 15, last Septem- 

 ber 10; Fort Collins, first July 13, last September 12. According to 

 Gillette, the eggs of the first generation were most abundant August 

 12. In 1901 the w^'iter found eggs most abundant between Jidy 15 

 and August 4. In 1902 they were most abundant about the same time, 

 but were obtained in cages as late as August 29. The dates of the 

 maxima of this generation of the larvsv going under bands is well 

 shown in Ta})le VI for the second generation. An examination of these 

 band records as pul dished shows that the period of the larvse leaving 

 the fruit and entering the bands extends over two months. 



HIBERNATION. 



The following table l)v Gillette shows the time at which pupation 

 ceased and the larva? began to hibernate at various places in Colorado. 

 It was found, as shown by the taljle, that pupation ceased between 

 August 10 and August 80, varying with th(^ localit}' in which the 

 experiments were made. 



Tahle YIl. — J'roporlion of Idhcrnuting larriv. taken at different dates. 



Cordley has for several years l)een una))le to breed any moths after 

 September 15. In 1900 the writer found that pupation had ceased 

 September 1, and in 1901 September 7. In 1902 more extensive breed- 

 ing experiments were carried out, from which it was found that pupa- 

 tion began to grow less about August 1 and entirely ceased August 

 22, and that no moths emerged after September 17. 



