PLATE XXXIX. 



Rhopalosiphum ribis. (Page 9.) 



Fig. 1. — Apterous viviparous female. 



Fig. 2. — Winged viviparous female, a and 5, Upper 

 and lower wings, c, Clavate cornicles and tail. The 

 former are characteristic of the genus. They are 

 charged with oily globules, d, Leaves of the black 

 currant contorted into bladder-like cavities, within 

 which the Aphides conceal themselves. Drawing, 

 natural size. 



