554 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



1 inches, and are either a pure milk-white, or more or less spotted 

 with black, the number of spots being exceedingly variable. The 

 full grown caterpillars are about an inch long, covered with long 

 black and white hairs which project from numerous black tubercles. 



I 



FIG. 404. The fall webworm (Hyphantria cunea Dm.): a, light form of full- 

 grown larva; b, dark form of same; c, pupa; d, spotted form of moth 

 all slightly enlarged. (After Howard, (J. S. Dept. Agr.) 



They are also quite variable in color, some being uniformly yellow- 

 ish with black and yellow tubercles, while others have a dark 

 stripe down the back and are almost black. 



Life History. In the North the moths emerge late in June and 



