986 LIST OF HOMOPTEEOUS INSECTS. 



Distance between the first and second veins at the base less 

 than half that between them at the tips ; third much farther from 

 the second at the tip than at the base, a little farther from the se- 

 cond at the base than the second is from the first ; first fork very 

 much nearer to the second fork at the tip than to the third vein, as 

 near to the third vein as the third is to the second ; second fork as 

 near to the fourth vein as to the first fork ; fourth vein curved near 

 the base, almost straight towards the tip, very much nearer to the 

 second fork than to the tip of the rib-vein. 



Var. First fork a little nearer to the third vein than the third is 

 to the second. 



Var. Distance between the first and second veins at the base 

 less than one-third of that between them at the tips ; third a little 

 farther from the second at the tip than at the base, much farther 

 irom the second at the base than the second is from the first ; first 

 fork at the tip four times farther from the third vein than from the 

 second fork ; second fork more than twice farther from the fourth 

 vein than from the first fork. 



a—u. England. (In Canada Balsam). From Mr. Walker's col- 

 lection. 



86. Aphis Padi. 



Aphis Padi, Linn. Si/st. Nat. ii. 734, 8. Faun. Suec. 981. Reaum. 



Ins. iii. pi. 23, f. 9, 10. Fabr. Sp. Lis. ii.389, 45. 3Iant. Ins. 



ii. 317, 50. Ent. Si/st. iv. 220, 50. Si/st. Rhyn. 301, 50. 



Gniel. Ed. Si/st. Nat. i. 2203, 8. Schrank, Faun. Boic. ii. 



115, 1216. Stew. El. Nat. Hist. ii. 110. Turt. Syst. Nat. ii. 



708. Kalt. Man. Pfan. i. 74, 53. Ratz. Forst. Lis. iii. 217, 



8. Walk. Ann. Nat. Hist. Ser. 2, v. 274, 78. 

 Padifex, Amyot, Ann. Sac. Ent. Fr. 2me Serie, v. 477, 523. 



Distance between the first and second veins at the tips full 

 thrice that between them at the base ; third very much farther from 

 the second at the tip than at the base, very much farther from the 

 second at the base than the second is from the first ; first fork much 

 nearer to the second fork than to the third vein, much nearer to the 

 third vein than the third is to the second ; second fork as near to the 

 fourth vein at to the first fork ; fourth vein long, curved near the 

 base, straight towards the tip, full twice farther from the tip of the 

 rib-vein than from the second fork. 



a. Scotland. Presented by E. Doubleday, Esq. 

 b — zzz. England. (In Canada Balsam). From Mr. Walker's col- 

 lection. 



