102 
Psyche 
[March 
Fig. 3. Immature stages of Boreus notoperates. A, freshly laid egg. 
B, egg just before hatching — note larval head, transverse band, margins 
of reflexed end of abdomen. C, rent chorion following hatching. D, first 
instar larva. E, first instar larva dissected from egg at stage comparable 
to B. F, last instar larva — especially note conformation of pigment under- 
lying stemmata (KOH preparation). G to I, pharate pupal heads — note 
change in both position and conformation of eye pigment, and its relation 
to the development of the imaginal eye. J, pharate adult female — note 
connections between imaginal fixed setae of gonapophyses and corresponding 
setae of pupal exuvium. Scale = 0.5 mm, applies to figs. F through I; 
scale = 1 mm for J ; for dimensions of eggs and first instar larvae, see text. 
months at 7°C, and 44 of 46 eggs of her series hatched. In the case 
of B. notoperates, two of four eggs kept at 20°C hatched in a period 
of 24 days; the other two were at the stage of hatching at that time, 
but the larvae died without perforating the chorions. 
The four freshly laid eggs of B. notoperates which I followed 
swelled, in the first 15 days, from 0.5 X 0.3 mm to 0.66 X 0.46 mm 
— 0.68 X 0.50 mm, at which time the larval head, pigmented eyes, 
jaws (mostly held open, but moving from time to time), and reflexed 
abdomen could be seen, as well as a grayish, transverse band that had 
appeared on or near the chorion below the larval head (figs. 3B, E). 
