THE EEiPORT OF THE 



Xo. 36 



From July 3rd they increased rapidly and were still abundant July ^Oth, but 

 soon after disappeared. They were seen, however, a week or more later in the 

 orchard than the preceding species. 



The above data shows that this year T. rosaceana adults began to emerge 

 about two weeks earlier than those of T. argyrospila and the latter about a week 

 earlier than those of T. semiferana. 



Rosaceana and semiferana seemed to pupate almost invariably in the leaves, 

 but much to our surprise fully half of the pupation of argyrospila either took 

 place on weeds or in the grass or else the pupa were shaken by the wind out of the 

 leaves into the grass beneath. For instance, we spread a covering of cheesecloth, 

 8 X 10 ft. in size, on the ground beneath a tree on June 26th after emergence 

 had begun and under this 320 pupfe or empty pupal cases Avere found and 



Some of the parasites that help to control Leaf-rollers, 

 the left are Tachlna Flies and their piiparia; on 

 the right Ichneumons. 



On 



upon it 84 pupge, making a total of more than 400 which we estimated was a 

 larger number than the total of the pupa" on the corresponding part of the tree 

 above the sheet. There was no lack of food on the trees to force them to descend 

 and very few weeds other than withered 1)lue grass. Wherever there were succu- 

 lent weeds under infected trees many larva? fed and pupated in these. 



iS'one of the species of moth fly around in the day, unless disturbed, and 

 then with a rapid zigzag motion they fly down into the grass to hide. Owing to 

 the distance (21/0 miles) of the orchard from our boarding places and the fact 

 that the moths did not lay during the day time so far as we could tell, we did 

 not see any of them ovipositing hut know that the eggs outside are laid within 

 a few days after the emergence of the adult, just as they are in the cages. 



There is clearly only one hrood a year ol the Fruit-tree Leaf-roller and of 

 the Box-elder Leaf -roller respectively, but there are two broods of the Oblique- 



