142 NEW YORK STATE MUSEUM 



days or a week of rain or other causes at the time the poison should be 

 applied. 



Not a few wait till the trees show signs of serious injury and then ask 

 for some means of stopi^ing the ravages. Resort may be had under such 

 conditions to spraying with a larger proportion of ])()ison in order to kill 

 the caterpillars quickly or they may be shaken from the limbs, provided the 

 tree is not too large. Tlu: hitler means will give a certain amount of relief 

 where practicable and should be supplemented by the use of cotton bands 

 or other measures for preventing the ascent of those shaken from the tree. 



Bibliography 



1885 Lintner, J. A. Ins. N. Y. 2(1 Rep't, p. 6S-89 



1895 Howard, L. O U. S. Dept Agric. Year Book, p. 368-75 



1895 Lintner, J A. Ins. N. Y. nth Rep t, p. 124-26 



1898 Felt, E. P. State Ent. 14th Rep't N. Y. State Miis. Bui. 23, p. 163-76 



1898 Fish. Game and For. Com. 4th Rep't, ]). 368-74 



Fall webworm 

 I fypliantria Icxtor Harris' 



Conspicuous web tents in July and August inclosing skeletonized, usually brown 

 leaves on the tips of branches are the most conspicuous signs of the presence of this 

 insect, a species which feeds on a large number of trees and occurs commonly on the white 

 elm, willows and poplars in New York State. 



The conspicuous webs of this cater])illar are very familiar objects the 

 latter part of summer. They may be recognized at once by their inclosing 

 all the leaves of a twig or branch and if these features are kept in mind 

 there will be no danger of confounding this species with the common tent 

 caterpdlar, a pest which forms webs in early spring in the crotches of the 

 limbs and does not inclose leaves within its webs. The hairy fall web- 

 worms feed under their tent on the softer ujjjjer portions of the foliage 

 which soon dries. The bc;auty of the tree is seriously marred by the 

 unsightly nests and the brown, skeletonized foliage within them. Occasion- 

 ally this insect is present in such large numbers as to devour most of the 



■ Discussed under Hyphantria cunea Drury in 5th report of Fisheries, Forest 

 and Game Commission. 



