THE IMPORTED CABBAGE WEBWOBM. 



37 



The moths which issued December 11 deposited eggs for a succeed- 

 ing generation. Unfortunately, it was necessary to abandon the work 

 at this point and records of further development were not obtained. 



EGG-LAYING RECORDS. 



On October 11 a pair of moths, which had issued that day, were 

 observed mating. These moths, while still together, were put into a 

 separate cage and the following record obtained : 



Eggs deposited. 



October.13 79 



October 14 49 



October 15 31 



October 16 32 



October 17 : 13 



October IS 15 



October 19 5 



October 20 11 



Total 235 



The female died October 21 and the male died the following day. 

 The female lived 10 days and deposited 235 eggs. The male lived 

 11 days. 



With another mating pair, which were likewise confined during 

 October, the female lived 14 days and deposited 237 eggs. The male 

 lived 17 days. 



The life-history records were obtained in an open-air insectary in 

 which open wire cages were used. Food was supplied the moths by 

 putting in wads of absorbent cotton which had been saturated with 

 molasses and water. They fed on the diluted molasses eagerly. The 

 moths were docile and easily handled, and mating pairs were readily 

 obtained during the daytime. In all cases, cabbage was used as food 

 for the larvae. Usually young, tender plants from seed beds were 

 supplied. 



Following is the temperature record at Honolulu during the time 

 the species was reared: 



Month. 



1910 



September 



October 



November 



December 



Minimum 



Maximum 



tempera- 



tempera- 



ture. 



ture. 



°F. 



°F. 



69 



85 



65 



84 



66 



84 



62 



80 



Average 

 mean tem- 

 perature 

 for entire 

 month. 



>F. 



77.0 

 75.3 

 74.6 

 71.2 



NATURAL ENEMIES IN HAWAII. 



Manv larvae were collected at various dates from cabbage and 

 other cruciferous plants in the gardens in Honolulu and Wahiawa 



