LIST OP HOMOPTEROUS INSECTS. 947 



Group 8. Walk. Ann. Nat. Hist. Ser. 2, i. 443. 

 17. Aphis Juglandis. 



Aphis Juglandis, Frisch. Ins. xi. 12, 10, pi. 16, f. 1,5. Gmel. Ed. 



Syst. Nat. i. 2210, 70. Walk. Ann. Nat. Hist. Ser. 2, i. 443, 



17. 

 Lachnus Juglandis, Kalt. Mon. PJian. i. 150, 3. 

 Juglandifex, Amyot, Ann. Soc. Ent. Fr. 2me Serie, v. 481. 



The lib-vein is stout, and almost imperceptibly approaches the 

 fore border till it diverges and encloses the brand, which is some- 

 what darker than the rest of the space between the rib-vein and 

 the fore border ; the angle is distinct, and the space thence to the 

 tip is almost one-third of the length of the brand ; the fourth vein 

 is much curved throughout, and the distance of its tip from that of 

 the rib-vein is rather less than that of the latter from the angle ; the 

 third, vein has its source where the rib-vein diverges from the fore 

 horder ; the space between its forks exceeds its length before the 

 first fork, and is still longer than the second fork ; its distance at the 

 base from the fourth is full twice that of the latter from the tip of 

 the rib-vein, and it is nearly equally distant between the fourth and 

 the second veins ; it is slightly curved near the base ; the distance 

 between the first and second veins at their tips exceeds by rather 

 more than half that between them at the base; the distance be- 

 tween the first and second veins at the base is rather less than 

 that between the second and third veins, but at their tips it is much 

 more ; the first vein diverges much from the second, and is perpen- 

 dicular to the rib-vein. 



a. England. Presented by J. C. Dale, Esq. 



b — i. England. (In Canada Balsam). From Mr. Walker's collec- 

 tion. 



Group 9. Walk. Ann. Nat. Hist. Ser. 2, i. 444. 



18. Aphis bifrons. 



Aphis bifrons, Walk. Ann. Nat. Hist. Ser. 2, i. 444, 18. 

 England. 



3 o 2 



