312 Report oF THE DEPARTMENT OF ENTOMOLOGY OF THB © 
covered with the white fluffy scale. September 14 no change 
was apparent except with two larve, one of which had pushed 
the scale nearly off from the body! while the scale of the other 
had begun to turn light brown. September 22 the scales of two 
larvee were somewhat more dense than the others but otherwise 
there was no apparent change. From this time on there were 
no further signs of development and by December 20 they were 
dead. 
Lot 2. This lot consisted of 18 larvee born October 5 and trans- 
ferred, the following morning, to an apple which was at once 
placed in Room1. They settled down almost immediately. Octo- 
ber 8 they were dormant and naked with the exception of two 
which showed faint traces of cottony threads. One was sparsely 
covered with them. Examinations were made every other day 
but no further development was apparent. November 17 they 
were carefully examined and found to be dead. | 
Summary.—tThe effect of an average temperature of 35°F. upon 
the young larve is here indicated and definitely shown so far as 
the larvee under observation were concerned. They settled down 
almost immediately and attempted at once to cover themselves 
with a scale. More than half succeeded in doing this, but all 
perished before reaching the normal hibernating stage. 
Room 2.—Average temperature 45°F. Lot 1 consisting of 84 
larve born September 4 and transferred to apples the following 
morning. 
September 6. All had settled, a few of the white fibres showing 
in every case but one and this larva was naked. 
September 8. Nearly all showed the white central tuft. 
From this time on there was no further development until 
October 24, when six infested apples (86 larve) were transferred 
to the insectary where the average temperature was 75°F. By 
October 27 a slight indication of development was apparent. 
October 30 the white fibres of the new addition to the scales were 

*This has been observed in the laboratory. It is done by a movement 
of the posterior segments, 
