APHIDS INJURIOUS TO ORCHARD FRUITS. 



29 



Fig. 21. — Currant apliids : a. Wingless agamic female of tlae currant aphis (Xii/~iis ribis) ; 

 6, distorted currant foliage due to attacli of tliis species ; c, spring migrant of the sow- 

 thistle aphis {Rhopalosiphnin lactucae) ; d, injury to currant by this species; e, 

 worli of the green gooseberry aphis (Aphis sanhorni) on gooseberry ; f, wingless agamic 

 female of the Xew Mexico gooseberry aphis (Aphis neomexicanus) ; g, wingless agamic 

 female of Sanborn's currant aphis (Aphis ribis). a. c, f, g, Greatly enlarged. 

 (Original.) 



