88 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



obtained, while in the rest eggs were deposited in greater or less 

 abundance. In the summary of the oviposition records (Table XXY) 

 it may be observed that on an average the moths first oviposited 5 

 days after their emergence; in one instance this period extended to 

 13 days; the earliest oviposition took place 2 days after emergence. 

 The length of oviposition in the various jars lasted, on an average, 7 

 days, with a maximum of 15 days and a minimum of 1 day. From 

 the time of emergence of the moth the last oviposition in the various 

 jars took place, on an average, the eleventh day, the longest time 

 being 19 days and the shortest 6 days. On comparing the oviposition 

 records of observations for the two broods of moths (Tables VIII and 

 XXV) it will be noted that the records show practically similar results. 



The oviposition period extended from August 6 — the fifth day 

 after the emergence of the first moth — to September 22. Of the late 

 deposited eggs only those laid previous to September 12 hatched, as 

 the prevailing cold weather at that time stopped further develop- 

 ments. 



Length of life of individual male and female moths. — In the various 

 stock jars which were used in the oviposition experiments records 

 were kept as to the length of life of 57 male and 92 female moths. As 

 has already been described in connection with the spring brood, 

 moths of the first brood were similarly fed with brown sugar and 

 honey and received daily fresh apples and apple foliage for oviposition. 

 Summaries of the results of these observations are given in Tables 

 XXVI and XXVII. The average length of life for the male moths 

 was 9.79 days, and for the female moths 11.47 days. 



LIFE CYCLE OF THE FIRST GENERATION. 



In connection with the various rearing experiments for the separate 

 stages of the first generation a set of experiments was conducted, 

 carrying individual insects through a complete life cycle. The results 

 of these observations (see Tables XXII and XXIII) agree closely 

 with the sum total of the averages of observations on the separate 

 stages. 



