QUINCE CULTURE. 



exceedingly hardy and vigorous, and readily adapts itself 

 to any food available. 



Remedies. There is no surer method of destroying 

 them than to gather the cocoons as they hang on the trees 

 and burn them. They are easily seen during the winter. 

 This is emphatically applying the ounce of prevention 

 that will save the pound of cure. Two insect friends aid 

 us, both ichneumons. The Cryptus inquisitor (Say) is 

 about two-fifths of an inch long. The Hemiteles thyri- 

 dopteryx (Riley) is about one-third of an inch long. 



Fig. 95. 



CRTPTUS INQUISITOR. 



Fig. 96. Male. Fig. 97. Female. 



HEMITELES THYRIDOPTERYX. 



Five or six of these sometimes occupy the body of a 

 single bag-worm. After destroying the worm, they spin 

 for themselves, within its cocoon, small white cocoons. 



12. THE CORN EMPEROR MOTH, THE lo EMPEROR 

 MOTH (Hyperchiria lo, Linn., Saturnia lo, Harris, Hy- 

 percJiiria varia, Walker). The common name of this 



moth probably came from 

 its feeding on corn and for- 

 aging on both trees and veg- 

 etables, a very uncommon 

 habit with insects. It not 

 only feeds on the quince, but 



Fig. 98. LARVA OF THE CORN J . 



EMPEROR MOTH. a wide range of trees and 



vegetables. The moth is 



very beautiful, and only flies at night. The sexes differ 

 both in size and color, the male being the smaller. His 

 color is a deep yellow, with purplish brown markings. His 



