248 MAINE AGRICULTURAL EXPERIMENT STATION. I9IO. 



of winged form dorsal aspect; 211, a single dorsal wax-gland 

 area from pupa, greatly magnified; 212, pupa just before molt- 

 ing, showing the lateral and part of the dorsal wax-gland areas 

 on pupal skin. 



Figs. 213-214. Mastopoda pteridis, apterous viviparous form 

 and antenna. 



Figs. 215-219. Symdobius oblongus. 215, wings; 216, 

 caudal tip of abdomen of winged form showing cornicles; 217, 

 antenna showing the alternate banding of light and dark; 218, 

 Til, showing sensoria ; 219, III, showing sensoria in profile. 



