244 
eral resemblance to the young larvae of 
some species of Callimorpha. 
Fearing that they might succumb to 
the somewhat 
the rearing cage, I attached them, for 
hibernation, to a branch of the tree, 
under a thick muslin cover. They were 
not again examined until the middle of 
the following March, when, as the season 
was early, they were found to have 
awakened from their torpor and to be 
crawling about over the bits of bark upon 
which they had wintered. For more 
convenient observation they were again 
placed in the insect cage and liberally 
supplied with the most advanced buds. 
They did not, however, seem to feed 
upon the latter, and continued to crawl 
about restlessly over the bits of dry bark, 
which they covered with a great deal 
of fine cob-webby matter. On the Ist 
of April both molted and shortly after 
this I discovered that they fed upon the 
outer surface of the bark itself, or upon 
the lichens that covered it. Fresh bark 
was provided upon which they began 
gnawing with avidity and from this time 
growth was quite rapid. A second molt 
occurred 15 Aprilandathird 1 May. At 
this date they measured 8.3 mm. in 
length by 2.5 mm. in diameter. The 
form was somewhat flattened and the 
width nearly the same throughout. Color 
pale cinereous, variegated with fine 
curved lines and dots of purple-brown ; 
medio-dorsal stripe pale, margined on 
each side with a distinct purple line, not 
continuous, but composed of very minute 
dashes and dots. Venter translucent, 
dingy buff. Head and legs colored sim- 
unnatural conditions of 
PSTCHE: 
ilarly to the dorsum, all sparsely clothed 
with long, fine, light hairs springing di- 
rectly from the surface. 
On 7 May both larvae were enclosed 
under a veil-like smoke-colored web, 
closely appressed to the under side of the 
bark. They had shrunken somewhat and 
the thoracic segments appeared slightly 
flattened and bulging laterally, giving 
the insects the appearance of minute 
catocalid larvae. By 10 May both had 
completed their first transformation. 
Pupae, 6.2 mm. in length, oblong, de- 
pressed and of a glossy dark brown 
color. The imagines appeared on 27 
and 28 May and proved to be of different 
sexes. 
As Mr. Grote’s description of the per- 
fect insect is brief I take the liberty of 
appending it : — 
Imago: ‘Anterior wings entire, silky, 
dark steel grey with a yellowish well 
defined spot on the costa near the 
apex. A band of same color on the 
internal margin, well defined and com- 
mencing near the internal angle and con- 
tinuing to the base of the wing, showing 
a spot of the same shade as the ground 
color. Posterior wings rose color with 
a wide greyish border not extending 
quite to the anal angle. Under side of 
the wings showing the markings of the 
upper. Head rose color. Antennae 
darkish. Thorax yellowish. Abdomen 
rose color. Expands eleven sixteenths 
of an inch [17.5 mm].” In the male the 
yellow bands and spots on the anterior 
wings are broader than on the female, 
and the abdomen of the former termin- 
ates in a dense rose colored tuft. 
an 
