950 LIST OF HOMOPTEROUS INSECTS. 



Var. Length between the forks of the third vein in one wing 

 only half of that in the other wing. 



England. 



Group 11. Walk. Ann. Nat. Hist. Ser. 2, i. 448. 



21. Aphis Aceris. 



Aphis Aceris, Linn. Syst. Nat. ii. 736, 31. Faun. Suec. 999. 



Reaum. Lis. iii. 281—350, pi. 22, f. 6—10. Fabr. Si/st. Ent. 



735,9. Sp. Lns. ii. 385, 10. Mant. Ins. ii. 315, 11. Fnt. 



Si/st. iv. 212, 11. Syst. Rhyn. 295, 1 1. Geojf. Ins. Par. i. 495, 



5. Scopoli, Ent. Cam. 137, 397. Rossi, Faun. Etrusc. 260, 



1372. Schrank, Faun. Boic. ii. 1, 111, 1205. Gmel. Ed. 



Syst. Nat. i. 2208, 3\. Enc. Meth. Ins. pi. 116, f. 6, Berk. 



Syn. i. 121. Stew. El. Nat. Hist. ii. Ill ? Turt. Syst. Nat. 



ii. 703. Fnnscol. Ann. Soc. Ent. Fr. x. 173, 13. Kalt. Mon. 



Pflan. i. 125, 97. Ratz. Forst. Ins. iii. 218, 15. Walk. Ann. 



Nat. Hist. Ser. 2, i. 448, 21. 

 Acerifex, Amyot, Ann. Soc. Ent. Fr. 2me Serie, v. 479. 

 Aphis Aceris? (New York), Fitch, The Senate, No. 30, 66. 

 Aphis villosus ? Hartig, Germ. Zeit. iii. 369, 8. 



Rib-vein hardly approaching the fore border, and then very 

 slightly diverging from it ; the angle is very blunt and hardly per- 

 ceptible, and its outward side is rather less than three-fourths 

 of the length of the inward side, and as long as the space be- 

 tween the tip of the rib-vein and that of the fourth vein ; first 

 vein very oblique to the rib-vein ; second vein more oblique than 

 the first vein, from which its distance at the baSe is almost or 

 hardly one-third of the distance at their tips ; third vein vanish- 

 ing at its source, almost parallel to the second till near the tip, their 

 mutual distance on the hind border a little exceeding that between 

 them along the rib-vein, the latter distance much more than that 

 between the first and second veins, but on the hind border it is much 

 less ; distance between the two forks much longer than the third vein 

 before the first fork and than the second fork ; distance between tip 

 of third vein and that of its first fork rather less than that between 

 the second and third veins; distance between first and second forks 

 as long or longer than that between the second fork and the tip of 

 the fourth vein ; fourth vein rather long, slightly curved for half 



