"PROFESSOR WIGGLER 81 



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 th% moth. 



All of mine appeared in 

 the first week of July of the 

 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- 



