PHYLUM ARTHROPODA 



353 



primrose, resemble a humming-bird. The larvae live on the 

 leaves of tomato and tobacco plants, Virginia creeper, and many 

 others; they are usually very large. The family ARCTIID.E 

 contains the fall-webworm, Hyphantria cunea, the larva? of 

 which live together in a web 

 and eat the leaves of many 

 kinds of trees and shrubs. 

 The white-spotted tussock- 



FIG. 285. Order LEPIDOPTERA. Gypsy-moth, Porthetria dispar. A, female. 

 B, larva. C, pupa. (From Osborn, after Howard.) 



moth, whose larva? feed on the leaves of trees and are often very 

 troublesome, belongs to the family LYMANTRIDJ*:. Another 

 important member of this family is the gypsy-moth, Porthetria 

 dispar (Fig. 285). The gypsy-moth w r as imported from Europe. 



FIG. 286. Order LEPIDOPTERA. Silkworm, Bombyx mart. A, caterpillar. 

 B, cocoon. C, adult female moth. (From Shipley and MacBride.) 



Its caterpillars devour leaves and have killed many of the finest 

 shade trees in certain parts of Massachusetts. 



A number of large common moths are placed in the family 

 BOMBYCID^E ; for example, the cecropia, Platysanria cecropia, 

 the giant silkworm moth, Tclca polyphcmus, the luna moth, 

 2 A 



