BULLETIN No. 159. 



THE FOREST TENT-CATERPILLAR. 



V. H. I<OWE. 



SUMMARY. 



The forest tent-caterpillar has been unusually de- 

 structive during the past season, its ravages extending 

 over a wide area. The . caterpillars feed upon the 

 foliage of a large variety of forest, shade, and fruit 

 trees, but during the past season have been especially 

 destructive to sugar maples. 



The life history of the insect is similar to that of the 

 apple-tree tent-caterpillar, discussed in Bulletin 152 of 

 this Station, except that the forest tent-caterpillars 

 do not build conspicuous nests. 



The insect may be successfully combated in all of 

 its stages, but under most circumstances, is especially 

 susceptible in the caterpillar stage. 



