112 



THE BROWN-TAIL MOTH 



Fig. 6.— Elm leaf curled by aphis. 

 (From Weed.) 



Fig. 7.— Eggs of Rusty Tussock Moth. 



whose eye is not trained to detecting the brown-tail webs. 

 The eggs of the rusty tussock moth frequently found on 

 fruit trees, especially plum, are often brought in for the 

 <eggs of the brown-tail where bounties are paid for its webs, 

 but as the brown-tail's eggs are laid only in summer there 

 should be no confusion. 



With the warm days of late April and early May the 

 little caterpillars emerge from their Avinter's home, the 

 balance of which they often devour before going to the 

 opening buds, upon which they feed greedily. The first 

 emergence noted in Massachusetts was on March 18, 1898, 

 the 29th of April being given as about the last of their 

 appearance. In 1905 the first caterpillars emerged at Dur- 

 ham on April 21 and continued to emerge until May 10, 

 the largest number emerging on May 6, thus commencing 

 to appear about the time the maximum temperature reached 

 60° Fahr. and the maximum emergence taking place about 



