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JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 4 



carefully examined to insure their freedom from eggs and maggots. 

 The pots were then covered with cheese cloth to avoid parasites and 

 reinfestation. In 1910 the work was repeated in the same manner, 

 except that a modification of the "Tower" cage was used instead of 

 the pots. Eggs were then placed on the soil close to the plants. With 

 the exception of renewing the food in some of the breeding cages of 

 1909, the insects upon hatching were permitted to feed, pupate and 

 emerge without interference. Both seasons the cages were sunk in 

 the soil, and it is believed that the moisture and temperature con- 

 ditions were about the same as in the surrounding earth. 



In 1909 only twenty-three adults were bred from eleven breeding 

 pots, the small number being due possibly to dry weather and insuffi- 

 cient food. The period from egg deposition to appearance of adults 

 ranged from twenty-seven to sixty-one days, with an average of 

 forty-three days. Eighty-two per cent of the individuals emerged 

 within forty-five days. 



The record for 1910 is shown in the following table: 



TABLE II 



RECORDS OF THE NUMBER OF DAYS FROM EGG DEPOSITION TO APPEARANCE OF 

 ADULTS, IN BREEDING CAGES, AT GENEVA, N. Y., DURING 1910 



The extent of time from the laying of the eggs to the appearance of 

 the adults, ranged from thirty-four to eighty-eight days, with an 

 average of fifty-five days. Fifty-four per cent of the adults emerged 

 within forty-five days. 



