LIST OF HOMOPTEROUS INSECTS. 975 



Var. ? The viviparous wingless female. Small, oval, smooth, 

 dull black or red, dark ^reen towards the hind part of the abdomen : 

 head sometimes pale yellow: feelers pale yellow, black towards the 

 tips, and rather shorter than the body : mouth pale yellow ; its tip 

 and the eyes black : nectaries dull pale yellow, with black tips, 

 as long as one-fourth of the body : legs dull pale yellow ; knees, 

 feet, and tips of shanks black. On Lapsana communis, before 

 the middle of October. 



Variation in the wing-veins. An additional fork at the se- 

 cond division of the third vein. 



a— p. England, (In Canada Balsam). From Mr. Walker's collec- 

 tion. 



69. Aphis Ribis. 



Aphis Ribis, Linn. Syst. Nat. ii. 733, 1. Faun. Snec. 977, Fabr. 



Syst. Ent. 734, 5. Sp. Ins. ii. 385. Mant. Ins. ii. 315, 7. 



Ent. Syst. iv. 211, 7. Syst. Rhyn. 295, 7. Mull. Fn. Frid. 



29, 276. Frisch. Ins. ii. 9, pi. 14. Reaum. Ins. iii. 281—350, 



pi. 22, f. 7—10. Hausm. III. Mag. i. 437, 2. Leeuwenh. Arc. 



Fp. 90, 545, 548, Blanch. Ins. 164, pi. 14, f. 52. Gmel. 



Ed. Syst. Nat. i. 2201, 1. Schrank, Faun. Boic. ii. 1, 108, 



1195. Berk.Syn. i. 119. Stew. El. Nat. Hist. ii. 110. Turt. 



Syst. Nat. ii. 703. Kalt. Mon. Pflan. i. 39, 26. Sir Oswald 



3Iosley, Gard. Chron. i. 628. Walk. Ann. Nat. Hist. Ser. 2, 



iii. 295, 61. 

 Ribifex, Amyot, Ann. Soc. Ent. Fr. 2me Serie, v. 476, 520. 



Distance between the first and second veins at the base much less 

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

 second at the tip than at the base, a litlle farther from the second at 

 the base than the second is from the first ; first fork at the tip as 

 near to the second fork as to the third vein, much nearer to the third 

 vein than the third is to the second ; second fork nearer to the 

 fourth vein than to the first fork ; fourth vein curved near the base, 

 straight towards the tip, very much nearer to the second fork than 

 to the rib- vein. 



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

 g — ee. England. (In Canada Balsam). From Mr. Walker's collec- 

 tion. 



