126 
Psyche 
[Vol. 87 
Table 2. Number of days in each instar for the seven individuals in rearing Lot 80-55. 
PR = preserved, s = standard deviation, N = sample size. 
individual 
I 
2 
3 
4 
5 
6 
7 
range 
mean 
s 
N 
egg 
5 
5 
5 
5 
5 
5 
5 
5 
5 
0 
7 
instar 1 
2 
2 
3 
2 
2 
2 
2 
2-3 
2.14 
0.38 
7 
instar 2 
4 
3 
2 
4 
3 
4 
2 
2-4 
3.14 
0.90 
7 
instar 3 
2 
2 
3 
3 
3 
3 
3 
2-3 
2.71 
0.49 
7 
instar 4 
4 
4 
3 
4 
4 
3 
2 
2-4 
3.43 
0.79 
7 
instar 5 
9 
11 
9 
9 
10 
9 
9 
9-11 
9.43 
0.79 
7 
pupa 
70 
PR 
59 
22 
61 
64 
21 
21-70 
49.50 
22.01 
6 
total days 
96 
— 
84 
49 
88 
90 
44 
44-96 
75.17 
22.60 
6 
total days 
non-diapause 
individuals 
49 
44 
44-96 
46.50 
3.54 
2 
total days 
diapause 
individuals 
96 
84 
88 
90 
84-96 
89.50 
5.00 
4 
sex 
3 
2 
<3 
<3 
2 
<3 
<3 
First Instar 
Upon emergence from the egg, the first instar larva has a black 
head (0.6 mm wide) and cervical shield. The prothorax just ventral to 
the shield is pink. The body is yellow-orange and has black setae and 
spiracles. After eating and expanding somewhat, the body becomes 
white and remains so through remaining instars. The arrangement of 
the head capsule setae is shown in Figure 11. 
All body setae are primary and are arranged as in the setal maps 
(Figure 12). Terminology used is that of Peterson (1962). Meso-and 
metathorax are identical except for the following differences: the 
spiracle on segment 8 is larger and is placed higher on the body than 
are those of the other segments. The/?/ group consists of one seta on 
segments 1, 7, 8, and 9; and two setae on segments 2-6. 
The crochets on the prolegs of abdominal segments 3-6 are 
uniserial and biordinal, and are arranged in a complete circle; those 
on segment 10 form a crescent on the anterior edge of the prolegs. 
The suranal plate bears eight setae (Figure 12). 
