74 



MISC. PUBLICATION 273, U. S. DEPT. OF AGPvICULTURE 



The caterpillar is brown, with a row of elliptical blue spots down 

 the center and two orange spots on each segment. On the sides are 

 pale orange lines and spots. 



Figure 33. — Great Basin tent caterpillar (Malacosoma frarjili-s) : A, Adults, natural size; 

 B, larva, pupa, and cueuun, x -. 



LOOPERS, SPANWORMS, OR MEASURING WORMS 



. (Geometridae) 



The leaf -feeding caterpillars of this family of moths infest a great 

 many species and varieties of trees and plants. Some species are 

 among the most destructive defoliators of forest trees. The cater- 



