PROFESSOR WIGGLER" 



8i 



no vestige of it now appeared, and its where- 

 abouts could only be guessed by the sHght 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 

 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 trisig7iata be- 



