INSECTS INJURIOUS TO THE QUINCE. 



ATTACKING THE TRUNK, 



No. 119, The Quince Scale. 



Aspidiotus cydonice Comstock. 



This scale is found on the quince-tree in Florida. It is 

 of a gray color, somewhat transparent, very convex in form, 

 and about six- hundred ths of an inch in diameter. Where it 

 is found injurious, it may be removed from the trunk and 

 limbs with a stiff brush dipped in a strong solution of soap. 



ATTACKING THE LEAVES, 



No. 120. The Basket-worm, or Bag-worm. 



Thyridopteryx epJiemerceformis (Haworth). 



During the winter the curious weather-beaten bags of this 

 insect may be seen hanging from many different sorts of 

 trees, both evergreen and deciduous. In the latter class they 

 are found on the quince, apple, pear, plum, cherry, peach, elm, 

 maple, locust, and linden, and in the former on arbor-vitae, 

 Norway spruce, and red cedar. If a number of these bags 

 are gathered in the winter and cut open, many of them will be 

 found empty, but the greater portion will be seen to present 

 the appearance shown at e in Fig. 226, being in fact partly 

 full of soft, yellow eggs. Those which do not contain eggs 

 are male bags, and the empty chrysalis skin of the male is 

 generally found protruding from the lower end. 



The eggs are soft, opaque, obovate in form, about one- 

 twentieth of an inch long, and surrounded by more or less 

 222 



