121 



Fig. it,. — Cacoecia rosana. 



the pupa is about to change to an adult it works its way nearly 

 out of the nest, only the caudal end of the body remaining within 



the folds of the leaf. This end of 

 the body is armed with several 

 hooks which the pupa fastens into 

 some of the threads of silk spun 

 about the nest, thus securely anch- 

 oring itself in place. Then the 

 moth emerges leaving the empty 

 pupa skin clinging to the nest. 



The period required for this in- 

 sect to get its growth and undergo 

 its transformations alter leaving the egg is a little more than a 

 month. The eggs hatched during the last days of April (April 

 27-28). Some of the larvae had reached the last larval stage by the 

 middle of May. While others were not more than half grown at. 

 this time. The first pupa was observed May 22d ; and within a 

 week all of the larvae had transformed to pupae. The moths began 

 to emerge June 3d. 



Eggs were not obtained from the moths that we bred ; conse- 

 quently only one generation was observed. It is probable, how- 

 ever, that there are two or more broods each season. The time at 

 which the eggs were found shows that the species passes the win- 

 ter in this form. 



The adult (Fig. 14,) is a moth with a wing ex- 

 panse of three-fourths of an inch. The fore 

 wings are olive brown crossed by bands of darker 

 color. The hind wings are dusky. 

 Fig. 14.— Cacoecia Probably the most practicable method of de- 

 rosana. stroyiug this insect, should it become a serious 



pest, would be the careful pruning and burning of the infested 

 leaves and twigs. As the insect is concealed in the rolled leaves 

 during its larval existence, the application of arsenical sprays 

 would probably be of little use. 



