" PROFESSOR WIGGLER " 8 1 
no vestige of it now appeared, and its where- 
abouts could only be guessed by the slight rose- 
colored stain which the caterpillar had left on 
the bark below. What had happened ? 
The burrows had been completed in the night, 
and the caterpillars had retired into them, back- 
ward presumably, and then spun over the open- 
ing by a disk of silk, which they had finally, or in 
the process, tinted the exact color of the external 
surrounding bark. I have frequently exhibited 
one of these sticks, with its inclosed caterpillar, 
to curious friends, who were unable to locate, with- 
out long and careful scrutiny, the mysterious cur- 
tain. The twig, dried in a mild oven so as to kill 
the inclosed caterpillar, or with its farther side 
split off for his removal, would serve as an inter- 
esting permanent specimen, 
the delicate disk being oth- 
erwise ruptured by the final 
escape of the moth. 
All of mine appeared in 
the first week of July of the I 
next year. They were small, 
for the size of the caterpillar, yellowish- white 
" millers," the fore wings beautifully mottled 
and banded with brown, and each with three 
conspicuous round spots of dull red, which feat- 
ure has secured the insect its specific name 
of " Trisignata " Gramatophora trisignata be- 
