212 



SUBKINGDOM AKTICULATA. 



rough figure of a human skull, emits a plaintive squeal, 

 when disturbed. 



362. 



Acheronfta atr&pos, Death's-head Moth 



Bombycidae. The Common Silk-worm spins its thread 

 from a spinneret placed near the mouth. Its cocoon is 

 formed by the larva attaching a few threads lengthwise to 

 adjacent objects, and then turning itself around, thickening 

 the walls with a continuous thread, often one thousand feet 

 long. The Tent Caterpillar deposits its eggs in a bunch 



Fig. MS. 



Mg. 36U. 



\> 



Bombyx mori. 

 Silk-worm Moth and Cocoon. 



( 'lisiocampa americana, 

 A ent Caterpillar. Eggs, Larva, Imago 



