1902.] 



G ROTE— COCOON OF TELE A POLYPHEMUS. 



403 



that tlie moth should emerge from the cocoon in the high air 

 whence to take its flight. This emergence at an elevation was 

 effected by the spinning of a silken stem, attaching the cradling 



Fig. 2. Ordinary cocoon of Telea polyphernus without attachment. 



leaf permanently to the tree, so that the cocoon could not fall with 

 the dropping of the leaf in the autumn, safely swinging despite the 

 wintry winds. This custom of the larva has become fixed in the 

 arboreal Attacid genera Philosamia, Attacus and in Callosaniia 



