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The eggs were kindly sent me by Miss Emily L. Morton from 
New Windsor, N. Y., and received July 2, hatching in Brunswick, 
Me., July 3. 
#igg.—Length, about 1.5-1.8; breadth, about 0.5 mm. The 
shell is very thin, membranous, and entirely transparent, and under 
a 4-In. Objective is seen to be structureless, showing no traces of 
polygonal areas. 
They are similar to but not nearly so flat as those of Phobetron 
pithecitum. They are laid in small irregular patches side by side in 
two rows, and are densely covered with white woolly hairs from the 
body of the moth: They are at first pale green, becoming yellow- 
ish as the embryo becomes mature and nearly ready to hatch. 
Larva Stage I, Freshly Hatched.—Length, 1.5-1.8 mm. When 
first hatched they eat little holes in the upper surface of oak leaves. 
They have a thin soft skin ; are flat oval, lying on one side, and at 
first are yellow. Body short and thick, rather broad, yet some- 
what cylindrical, with eleven pairs of large dorsal tubercles, which 
are square at the tip, and give rise to very long white hairs of 
unequal size, some of which are nearly twice as long as the body. 
Besides the white hairs there are also short erect setze, dark brown 
at the attenuated ends, which also arise from the large long subdor- 
sal, not lateral, tubercles. The body, including the head, is pale 
straw-yellow. 
It molted July 10-11, the length of the stage being from six to 
seven days. In thisstage the head is not covered by the prothoracic 
segment, which though large has not yet become hoodlike. The 
very long fine spinulated hairs arise from all the tubercles, of which 
there are six on each segment, the dorsal tubercles on the second 
thoracic segment being slightly larger than those on any of the suc- 
ceeding segments; the hairs in question are more abundant on the 
anterior segments, z. e. the second and third thoracic, and the five 
basal segments, than on those behind. From the dorsal and subdorsal 
tubercles arise about a dozen spine-like setee, which are slender and 
about half as long as the body is thick; the end is acute, dusky, 
and thus made conspicuous in the mass of white delicate spinulated 
hairs clothing the body. None of these are poisonous. Stinging 
sete arise from the minute infraspiracular tubercles. The spiracles 
are very minute and difficult to detect. On each of the abdominal 
legs, situated above the planta, is a pair of short clavate sete, the 
seventh pair only bearing a single seta. 
