94 
wards die. From specimens collected in a greenhouse at Bloom¬ 
ington, Ill., January 24, 1908, and received from Mr. A. C. Beal, 
I was able to obtain complete notes on many parts of the life 
history, the breeding work being carried on in a greenhouse kept 
at about the same temperature as are rose houses in winter. 
The larvae pupated at various intervals from January 24 to 
February 27, and the adults emerged within 13 to 20 days, the 
exact record for all being given in the following table. 
Date of 
pupation 
Date of * 
emergence of 
adult 
Length of 
pupal stage 
January 31 
6 6 6 6 
February 15 
15 days 
“ 20 
20 “ 
6 6 66 
“ 20 
20 “ 
February 4 
“ 23 
19 “ 
Feb. 11-12 
“ 28' 
16 or 17 “ 
“ 18-20 
March 8 
17 or 19 “ 
“ 21-22 
“ 9 
16 or 17 “ 
“ 23-24 
“ 8 
13 or 14 “ 
66 66 66 
“ 8 
13 or 14 “ 
“ 27 
“ 11 
13 “ 
Two males and two females which emerged March 8 and 9 
were confined with a rose plant, and altho careful and almost con¬ 
tinual watch was kept, the moths were not seen in copula until 
8:25 p. m. March 10. Subsequent observation showed that copu¬ 
lation takes place only at night, and that pairs may remain in 
coitu thruout the night, but never later than sunrise. Egg-laying 
began the following afternoon. The eggs, in masses of 35 to 262, 
were placed on the upper surface of the rose leaves, along the 
depressions of the principal leaf-veins, each moth laying several 
masses. 
About ten seconds are required for the deposition of each egg. 
and all operations in connection with it are quite regular and 
systematic. The eggs are laid from right to left, or vice versa, 
and downward. Accompanying each egg is a sticky fluid which 
glues it to the leaf, and the female gives the egg-mass a surface 
coat of the same fluid by moving the ovipositor back and forth 
over it. When first laid the eggs are bright lemon-vellow, but being 
translucent the color of the leaf shows thru them. The embryos 
of the larv?e may he seen as clear colorless bodies thru the es:2f- 
shells within twenty-four hours after oviposition, and the mass 
darkens, becoming nearly gamboge. Within 9 or 10 days the 
eye-spots appear, and a day later the eyes and head change to 
blackish, and segmentation is plainly visible. The larvae hatch in 
