544 



JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 10 



Under conditions existing in the field, a large number of the larvse 

 of the second generation did not pupate until May of the following 

 year. The third generation seldom appears in sufficient numbers to 

 cause appreciable damage. 



Egg-Laying Records 



Egg-laying records were obtained at Rocky Ford, Col., by isolating 

 single pairs of moths immediately after they developed. The moths 

 were fed with the nectar of alfalfa blossoms and the eggs were de- 

 posited on sugar-beet leaves which were placed in the cages for the 

 purpose. The eggs were removed and counted daily. The number 

 of eggs deposited by five females of the first and second generations 

 were 153, 263, 377, 435 and 502, or an average of 346 eggs per female. 



A detailed record of the female of one of these pairs which developed 

 July 22 is given in Table III. 



Table III. — Egg-Laying Record of a Single Female Loxostege sticticalis at Rocky Ford, Col., 



IN 1915 



Date 



Numl)er of Eggs Deposited 



July 29.. 

 July 30.. 

 July 31.. 

 August 1 . 

 August 2. 

 August 3. 

 August 4 . 

 Augusts. 

 August 6 . 

 August 7. 

 August 8 . 

 August 9 . 

 August 10 

 August 13 



Total. . 



377 



The male died August 7 and the female died August 14. The egg- 

 laying period covered a total of sixteen days. • 



