96 PLATE CXLIV. 



thick and the bark covered with mofs, &c. and very feldom among 

 young trees. In the Caterpillar ftate it lives concealed *in a 

 fine filky vi^eb, fpun up on the leaves. When it is difturbed it drops 

 by a fingle thread from one branch to another, the glutinous fubftance 

 of the thread adhering wherever it touches, fa that if it is damaged 

 in any part the Infed is in no danger of falling, unlefs the laft faft- 

 ening breaks off. The Caterpillar changes to the pupa ftate early in 

 June : the firft appearance of the Moth is commonly about the end 

 of the fame month. 



In England we have another fma!Il Moth (Phalasna Chlorana) 

 which at firft fight may be miftaken for Phalasna Viridana. It differs 

 from this Infedl in feveral refpefts ; the under Wings are whiter, and 

 the ftripe along the anterior margin of the upper Wings incline more 

 to a cream colour than in our prefent fpecies j the Caterpillar alfo is 

 very different and feeds on the WiIlow» 



LINNiEAlsr 



