New York Agricultural Experiment Station. 307 



the elongation of one side of the scale. By October 16 one male 

 showed first and second molt-areas, light yellow in color. A nar- 

 row dark-brown ring separated the two areas. The lateral exten- 

 sion was light gray. October 30 one of the female scales was 

 mature. The first and second molts showed the broad light yel- 

 low bands with the narrow dark band between and the margin 

 dark brown. The entire scale was covered with a white polli- 

 nose substance. The remaining scales had all reached the black 

 stage and were dormant. 



No. 4. — This group included eight larvae born September 18 

 and kept on apples in the laboratory. They were not examined 

 until September 29. On this date they could be divided into two 

 lots based on the outward appearance of the scale. Lot 1 was 

 well covered with a tuft of white cottony substance. Lot 2 had 

 molted. All of this lot had a white nipple at the center sur- 

 rounded by a narrow slightly depressed band, deep brown in 

 color. On the outer margin of this depression was an elevated 

 ring of the same color and covered with a white pollinose sub- 

 stance. Prom this elevated ring the scales sloped down to a 

 nearly flat surface which formed the boundary of the oval figure 

 and was composed largely of the molted skin. This area was 

 light brown in color in nearly all cases, with a narrow black 

 extension on the margin. After this date there was no further 

 development of either lot. 



PERIOD OF REPRODUCTION. 



This period probably begins very soon after full development. 

 Owing to the fact that many of the scales under observation have 

 yet passed only to the hibernating stage we are able to present the 

 records of but seven females which are given in the following 

 table. It will be noticed that the average number of days is 

 30.2 while the highest number of young produced in a single 

 day was 8 and the average for the entire number was but 1.07. 



