THIRD ANNUAL REPORT OF STATE ENTOMOLOGIST. 199 



Having completed the necessary transformation in the pupal stage, 

 the pupa squirms part way out of the cocoon and splits on the back 

 at tlie anterior end. Through this split the moth emerges and, after 

 expanding and drying the wings, is ready for flight. 



The moth is a beautiful little insect, marked with many gray 

 and brown cross lines. Dark brown spots and streaks of orange 

 and gold occur at the posterior or outer end of the wing. Many 

 moths of this species as caught in the orchard do not have the mark- 

 ing here mentioned on account of losing their scales by rubbing. 

 The adult codling moth is not often seen in an orchard even when 

 abundant. It is shy and during the day spends most of the time 

 lying quietly on the leaves or on the bark. In flying the motions 

 are quick and it is not easy to follow them with the eye. When 

 disturbed and made to fly they soon come to rest again. The 

 moths are not attracted to light to any considerable extent. 



The moth probably lives but a few days, if the weather is warm, 

 and if conditions are favorable for rapid deposition of eggs. That 

 cold weather may greatly prolong the life of the moth is indicated 

 by an experiment conducted several years ago (1902). An un- 

 impregnated female moth was kept in a gauze covered bottle in a 

 refrigerator for a period of about two months. When taken from 

 the refrigerator and placed in a sunny window in the same bottle 

 it revived and flew qbout the bottle but died soon after. 



DATES OF Ai'r'EARING OF DIFFERENT STAGES. 



It is believed that there ate two full broods of the codling moth 

 in Montana, and only two. This opinion is based largely upon the 

 habits 01 the insects at Missoula in the summer of 1902 and partly 

 also on the data accumulated and published by various writers, 

 notabl}- Prof. C. P. Gillette. From tlie observations of all workers 

 in this subject it seems to be fairh'- clearly shown that there are only 

 two broods of moths anywhere in the United States. There may 

 be, however, conditions which will produce a partial third brood. 



The earliest arrivals of the moths from the o^Tr wintered larvae 

 make their appearance in Alontana during about the first week in 

 May and others continue to appear until about the 20th of June. 

 The moths are out in the greatest abundance about the first of June. 

 It is probable that the deposition of eggs may be greatly retarded 

 by unfavorable weather so that while under favorable conditions 



