37 



black, hairy body and transparent, stumpy wings. It is swift of flight 

 and, owing to its small size, transparent wings and short life, is rarely 

 observed. 



The adult female is grub-like, entirely without legs or wings. She 

 pushes her way partly out of the pupa shell, her head reaching to the 

 lower end of the bag, and there, without changing her position, she 

 awaits the male. After impregnation she works her way back into the 

 pupa skin, filling it with eggs as she again recedes. When all the 

 eggs are laid she wriggles out of the bag for the first and only time 

 in her life, drops to the ground and perishes. The elastic mouth of 

 the bag closes after her and the eggs are thus securely protected until 

 they are ready to hatch the ensuing spring. 



Remedial Measures. 



If these bags are noticed during the winter, there is nothing better 

 than simply picking them off. Arbor vitce and other coniferous plants 

 should be especially attended to, because these do not survive de- 

 foliation. With a little practice the bags can be readily seen on even 

 a thick hedge. On trees the matter is more difficult, but even there 

 the work will pay, and if thoroughly done there will be no cater- 

 pillars of this kind during the season following. 



If the insects are not noticed until summer, when they are at 

 work upon the foliage, any of the arsenical sprays may be used, except 

 on conifers, where only the arsenate of lead is safe. 



THE FAI<I. "WEB WORM. 



Hyphantria ounea, Drury. 



This insect derives one part of its common name from the fact 

 that the caterpillar makes a tent or web on the infested tree, and the 

 other from the fact that it is much m.ore abundant in late summer 

 than earlier in the season. The winter is passed in the pupal stage, 

 in a slight cocoon of silk intermingled with the hairs of the cater- 

 pillar. Early in May the adult makes its appearance, and is a snow- 

 white moth or miller; the anterior or fore wings often more or less 



