NEW YorK AGRICULTURAL EXPERIMENT STATION, 313 
apparent on most of the specimens. The scales continued to en- 
large slowly in this way until November 9, when the insects 
apparently ceased their activities and still remain dormant. 
Nearly all of them reached the normal hibernating stage. 
The effect of this temperature upon the adult females was 
shown by a number that were kept three months in this room 
and then removed to the laboratory. Within two days after the 
change some of them were producing young. 
Summary.—These results are interesting in showing that the 
young larve, although apparently unable to develop to the hiber- 
nating stage in a temperature of 45° F. were still able to resist 
this temperature for six weeks and when transferred to a room of 
higher temperature to continue development to the normal hiber- 
nating stage; also that the adult females may withstand it and 
produce young soon after.being removed to a higher temperature. 
Room 3.—Average temperature 58°F. Lot 1 consisted of ten 
larvee borne September 1 and transferred to one apple September 
2 which was immediately placed in the cool room. The scales 
were not again observed until September 29 when they could be 
easily divided into three groups according to the external appear- 
ance of the scale, as follows: Group 1, four larve, scales light- 
brown; Group 2, five larvee, scales dark gray approaching black, 
with small white central tuft. Group 8, one larva, side black. 
October 3, Group 1, light-brown, quite convex, with black addi- 
tion to margin. Group 2 and 3, no change, October 5, Group 
1 has passed first molt. The scales show characteristic light 
central area with narrow black band at margin of the scale. 
Group 2, no change. Group 3 has passed first molt. October 8, 
Group 1, very dark brown, nearly black. Group 2, no change. 
Group 3, black with dark brown nipple. From this time until 
October 30, Group 1 showed steady growth, passing the second 
molt and becoming full size about this date. Groups 2 and 3 
showed no further change. | 
Summary.—tIn this case the temperature of 58° F. was not 
sufficient to materially check growth until the normal hibernat- 
