56 



The following' are the band records taken by Mr. Avers, of Boise, 

 on 140 trees: 



Julv 2 



Julv 9 



Julv 16 



July 23 



August 2 



August 9 



August 18 ... . 



August 25 



September 2 . 

 September 10. 

 September 21. 



October 4 



October 19 . . . 



Date. 



1897. 



Larvse. 



862 

 704 

 268 

 740 

 606 

 290 

 580 

 684 

 526 

 227 

 340 

 642 



Date. 



i Larvse. 



1898. 



Julv 5 1, 118 



July 13 2, 201 



July 20 2, 020 



July 27 1,454 



August 3 1, 335 



August 10 963 



August 17 1, 095 



August 24 1, 125 



August 31 1, 580 



September 7 1, 474 



September 14 1, 860 



September 22 1, 965 



October 1 1, 594 



October 10 1, 125 



From the preceding record, from that of Professor Aldrich taken 

 at Juliaetta for 1899, and my own I have compiled the following table: 





1S97. 1898. 



1899. 



1900. 



First brood: 



July 16 ! July 13 

 Aug. 9 ; Aug. 10 



Sept. 2 Aug. 31 

 Sept, 10 Sept. 7 



Oct. 4 Sept. 22 



July 21 

 Aug. 12 



Aug. 18 



Julv 15 





Aug. 4 

 A lie. 25 



Second brood: 





Sept. 4 Sept. 1 



Third brood: 



Sept. 25 Sept. 25 











From these records, supplemented by observation, 1 can say defi- 

 nitely that there are three broods in the vicinity of Boise and the 

 greater part of the Snake River Valley. 



As to the fourth brood I have no definite information at hand. 

 Several growers have told me that such a brood exists in part. At 

 certain periods it is impossible to say to what brood an insect belongs. 

 For instance, in 1900, if a half-grown larva was found October 1 it 

 would be impossible to know whether it was the last of the third or 

 the first of the fourth. When cold weather conies, there are many 

 interesting things apparent. If young larva? are left in the fruit on 

 the ground, the\ T evidently perish. However, if taken inside with the 

 apples the}' complete their development, and if not destroyed insure 

 a crop of moths for the following spring. About September 5 it was 

 noticed that the larva? that had spun cocoons were not transforming, 

 but were still in the larval state, while those that had reached the pupa 

 state were developing slowly and the moths were emerging. It is 

 evident that it takes a higher temperature for the insect to change from 

 larva to pupa than from pupa to adult. 



MOISTURE AND HEAT. 



There is great mortality among the eggs of this insect, the direct 

 rays of the hot sun causing many to die. 



