540 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



the back. On the side of each segment is an oval pale blue 



spot with a broader vel- 

 vety black spot adjoin- 

 ing it in front, giving 

 somewhat the effect of an 

 eye-spot. Having found a 

 suitable place under loose 

 bark, in a fence, in the 

 grass or rubbish beneath 

 the tree, or in the shelter 

 of some neighboring build- 

 ing, the caterpillar settles 

 down and proceeds to en- 

 case itself in a thin cocoon 

 of tough white silk, in which 

 it transforms to the pupa. 

 About three weeks later 

 the adult moth emerges 

 from the pupa to con- 

 _-|3j tinue the life cycle, there 

 FIG. 471. Tent caterpillars on web one- being but one generation 

 half natural size. (Photo by Weed.) 



a year. 



The caterpillars are held in check by numerous parasitic 



FIG. 472. The tent caterpillar moth. (After Lowe.) 

 insects, some 24 species having been found preying upon them 

 by Mr. W. F. Fiske in New Hampshire,* as well as by preda- 



