16 



ANIMAL BIOLOGY 



remain during the winter, and the following spring hatch out. The 

 young caterpillars attack the leaves of the tree on which they have 

 hatched out, or if the cocoon was placed elsewhere, they crawl up 

 the nearest tree and start business at once. They are great travel- 

 ers, and this is the way they spread through a neighborhood, since, 



as already mentioned, 

 the female cannot fly. 

 To capture these insects 

 one may place a band 

 of cotton batting around 

 the trunk of each of the 

 trees one wishes to pro- 

 tect. The larvse do not 

 usually crawl over this 

 but will, if mature, pro- 

 ceed to pupate under- 

 neath the band. All 

 pupae and egg masses 

 should be collected (Fig. 

 12) and burned. This 

 is about as much as 

 the individual can do. 

 Where a spraying appa- 

 ratus is available the 

 trees should be sprayed 

 with lead arsenate, thus 

 killing all the caterpil- 

 lars. This caterpillar is 

 rather handsome as cat- 

 erpillars go, having a 

 bright red head and a series of yellow tufts of hair on the dorsal 

 part of the body (Fig. 11). 



16. ,Gypsy moth and brown tail moth. The gypsy moth (Fig. 

 13) was brought into Massachusetts from Europe in 1869 in con- 

 nection with scientific experiments. Some of these specimens acci- 



FIG. 12. Morris High School boys removing 

 63,020 eggs of tussock moth from four trees 

 on school grounds. Work directed by Paul 

 B. Mann. (Photographed by Lewis Enowitz.) 



