130 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 1 



varied from 3 to 64 days, those pupating earliest in the spring re- 

 maining the longest in that stage. 



In 1906 the first moth appeared June 9 and in 1907 on June 13, 

 In 1906 the last moth appeared June 26 and in 1907 on July 8. Thus 

 there was a period of emergence of 17 days in 1906 and of 25 days in 

 1907. It is interesting to note the relation of these dates of emer- 

 gence to the time of blooming of the apple. In 1906 the first moth ap- 

 peared about ten days and the majority about 15 days after the petals 

 dropped. In 1907 the first moth appeared about the time the petals 

 dropped and the majority a little over two weeks later. Thus in 1907 

 the earliest eggs deposited would have hatched about ten days after 

 the first spraying, while in 1906 they would not have hatched until 

 three weeks after the first spraying. This will have an important 

 bearing upon the effectiveness of the spray applied to the foliage and 

 would possibly make it more effective one year than another. 



Oviposition goes on for about a month, a female laying from 20 to 

 70 eggs, the average being about 50. The eggs we have observed 

 hatched in 9 or 10 days. It is exceedingly difficult to get the female 

 to oviposit. In 1906 we secured the record of seven moths, but in 

 1907 we were utterly unable to secure any oviposition tho the same 

 methods were pursued. The eggs are laid on the upper or under sur- 

 face of the leaves, only a fraction of 1% being laid on the fruit in this 

 locality. An examination of about 700 eggs in the orchard shows that 

 they are on the upper or under side of the leaves, but that on some 

 varieties there are a large number on the upper side and on others 

 more on the under surface. The average distance of 588 eggs from 

 the nearest apples on three trees in 1907 was 6i/4 inches, while the 

 average distance from the nearest apples of 744 eggs on six trees dur- 

 ing the past two years was nine inches, the average distance of eggs 

 on each tree varying from 2 inches to 28 inches. Eggs are sometimes 

 laid several feet from an apple and indeed are quite commonly laid 

 upon trees with no fruit at all. An examination of a young tree bear- 

 ing no fruit showed 31 eggs. Apples which are wormy do not seem to 

 be any nearer to eggs than those which are non-wormy. A careful 

 record of the nearest egg to the apples on several trees showed that 

 the eggs were as near to those non-wormy as to those wormy. Very 

 frequently the egg nearest a wormy apple has been 12 inches distant. 



The young larvae feed on the under surface of the leaves mining into 

 the mid ribs and angles of the veins branching from the mid rib and 

 into the axils of the leaves. We have succeeded in rearing a larva in 

 a water sprout and securing the moth from it and several larvee lived 

 for some time upon tender water sprouts altho we have no evidence 



