New York Agricultural Experiment Station. 309 



show first molt until October 1, while nearly all the other half 

 showed the second molt on the same date. The majority of the 

 scales were dark gray in color at the time of first molt. 



Lot 2 consisted of six larvae born September 5. They showed 

 first molt September 19, 



Lot 3 consisted of one larva born September 25. October 6 

 showed first molt. The scale at time of first molt was white 

 with white central nipple. 



Lot 4 consisted of 150 larvae born September 3. October 8 

 two individuals showed first molt. In both cases the scales 

 were black. October 12 the same specimens showed second 

 molt. -On this date, also, all of the males showed second molt 

 and the lateral projection of the scale was becoming apparent. 

 Up to the time of writing, December 31, the remaining larvaB 

 have not molted, but are dormant in the black stage. 



Lot 5 consisted of one larva born October 5, first molt October 

 30. At the time of molting the scale was light gray in color 

 with crater-like depression at the center. To December 81 there 

 is no trace of a second molt. The insect is now dormant. 



Lot 6 consisted of ten larvae born September 11. They were 

 oh a young apple tree in the insectary. October 12 no appearance 

 of first molt. October 26 one female had passed second molt. 

 The remainder are dormant (December 31) without showing first 

 molt. 



Lot 7 consisted of one larva born September 25. By October 

 14 it had passed the second molt. At this time the white central 

 tuft still remained. By October 25 it had disappeared. The 

 first and second molt-areas were dirty yellow and the remainder 

 of the scale gray. 



Lot 8 consisted of five larvae born August 25 and placed on 

 young apple trees in the insectary. October 5 all showed second 

 molt and were characterized by a central light-yellowish area 

 and black band toward margin. October 7 a number of larvae 

 were born from these females. 



Lot 9 consisted of one larva born August 31. There was no 



