GIPSY MOTH AND BROWN-taIL MOTH. 17 



designed for the purpose. (Fig. 9.) A thick, narrow band is left on 

 the tree trunk, preventing the caterpillars from reaching the foliage. 

 Tliis material is cheap and effective and is more easily applied than 

 is the sticky substance mentioned in the last paragraph, because it 

 is not necessary to scrape the trees before it is put on. 



Fig. 8.— Band of sticky material. Note that the enormous numl)crs of gipsy-moth caterpillars are 

 below the band, but none are above it. 



