CODLING MOTH IN COLORADO. 



99 



Table LXXIII. — Time of oviposition by moths of the first brood, observations 

 taken daily every three hours, except at 3 a. m., Grand Junction, Colo., 1916; 

 summary of Table LXXII. 



Num- 

 ber of 

 obser- 

 vation 

 periods. 



Period of observa- 

 tion. 



Total 



number 



of eggs 



deposited. 



Average 

 number 



of eggs 

 per ovi- 

 position 



period. 



Per cent 

 of eggs 

 deposited 

 per ovi- 

 position 

 period. 



Mean 

 tempera- 

 ture 

 during 

 ovipo- 

 sition 

 periods. 



7 

 7 

 7 

 7 

 7 

 7 

 7 



12 mt. to 6a. m 



6a. m. to 9a. m... 



9a. m. to 12m 



12 m. to 3 p. m 



3 p. m. to 6 p. m.. 

 6 p. m. to 9 p.m.. 

 9p. m. tt)12mt... 



24 



13 



58 



268 



1,535 



1,998 



381" 



3.42 



1.85 



8.28 



38.28 



219. 28 



285.00 



54.42 



0.56 

 0.30 

 1.36 

 6.27 

 35.92 

 46.68 

 8.91 



°F. 

 65.46 

 68.57 

 76.60 

 81.64 

 79.28 

 72.96 

 69.60 



m=noon ; mt=midnigbt. 



OVIPOSITION BY INDIVIDUAL MOTHS. 



Studies of the fecundity of individual moths were made in 1915 

 and 1916 by isolating pairs of male and female moths' in separate 

 cages. These moths were segregated either one or two days after 

 their emergence and were then confined in jelly-glass tumblers into 

 which were placed daily fresh apple or pear foliage and a small 

 piece of sponge moistened with newly made sugar solution. Each 

 cage was examined daily for eggs',. 



Moths of the first brood, 1915. — As shown in Table LXXIY, the 

 first moths in this study emerged July 26, while the last pair, No. 

 83, emerged August 19. The summarized results of the observations 

 show that the 83 moths deposited a total of 3,762 eggs, or an aver- 

 age of 45.33 eggs per female. The maximum number of eggs laid 

 by a single individual was 185; the average number of eggs laid 

 by a single female in one day was 10.84 and the maximum 80. 



Attention is here drawn to certain facts as revealed by a com- 

 parison of Tables XVI and LXXJV. It will be noted in the 

 former table, which gives in detail the oviposition data of moths 

 of the first brood confined, in 1915, in the usual large battery- jar 

 cages, that 46.73 was the average number of eggs deposited per 

 female moth, while 45.33 was the average number deposited per 

 female by the individual caging method, as shown in the latter 

 table. This latter method seems to have reduced the length of the 

 period of oviposition as well as delayed it somewhat. However, as 

 will be seen by a comparison of Tables XVII and LXXIV, the 

 average length of life of the female moth was about the same by 

 either method, it being 12.68 days when the moths were confined in 

 the large battery- jar cages and 12.80 days when caged individually. 

 A detailed record of this and other important oviposition data ob- 

 tained by the individual caging method in 1915 is given completelv 

 in Table LXXIV. 



