11 



this supply is exhausted they extend their web over a fresh supply, 

 and this is continued till many of these webs are a yai-d or more in 

 length and a foot or more in diameter. When numerous, they do a 

 great deal of damage, sometimes destroying all the leaves on a tree. 



Fall Wlb-Worm. 



a. Dark caterpillar, seen from siilc ; 6, liglit, caterpillar from above; c, dark caterpillar 

 from above ; d, pupa from below ; e, pupa from sii ie ; /, moth. — After Kiley. 



In the latter part of August or early in September, these cater- 

 pillars reach their full growth, and are then about an inch and a half 

 long with the body greenish yellow dotted with black. There is a 

 bright yellow stripe along each side, and a broad blackish stripe 

 along the back in some specimens, as shown in Fig. 9, h. They are 

 thinly clothed with grayish hairs which arise from black and orange 

 colored tubercles. They now leave their web and scatter in all 

 directions seeking some place in which to change to pupae, usually 

 in some crevice under the bark, or under ground. When they 

 have reached a satisfactory shelter they spin a slight cocoon of silk 

 intermixed with hair from their own bodies, and within these cocoons 

 they transform to pupae. Fig. 9, d and e, where they remain till the 

 following June or July when the moths emerge. There are said to 

 be two broods in a year in the South but only one in the North. I 

 have seen no satisfactory evidence that there is more than one 

 brood in Massachusetts. 



The moths are snow white with the first two joints of the fore legs 

 yellow, and the outer joints of all the legs broadly ringed with black 



