Saturniidae 
leucince. These subfamilies may be discriminated by the help of 
the following Key: 
Hind wings with one distinct internal vein. 
Discal cell of both wings open - - - Attacince. 
Discal cell of both wings closed - Saturniincs. 
Hind wings with two distinct internal veins - Hemileucmce. 
Fig. 36. —Philosamia cynthta. a. Eggs; b. Larva; c. Cocoon; d. Pupa; e. Moth. 
(After Riley.) 
8l 
