LIST OF HOMOPTEBOUS INSECTS. 943 



12. Aphis annulata. 



Aphis annulatus? Hartig, Germ. Zeit. iii. 369, 10. 

 Aphis Quercus, Kalt. Mon. Pflan. i. 98, 74. Ratz. Forst. Ins. iii. 

 217, 10. Walk. Ann. Nat. Hist. Ser. 2, i. 337, 12. 



The rib-vein is parallel to the fore border till it slightly inclines 

 thereto at a little before the beginning of the brand, where the space 

 between them widens ; the angle of the brand is distinct, and the 

 space between it and the tip of the rib-vein is near half the length of 

 the brand ; the fourth vein is curved towards the base, but its latter 

 part is nearly straight ; the space between its tip and that of the rib- 

 vein is a little more than that between the latter and its angle ; the 

 third vein before the first fork is generally a little longer than the 

 space between the forks, but sometimes as long or even shorter ; the 

 distance between the tips of the second fork and of the fourth vein is 

 more than that between the tips of the two forks, and very much more 

 than that between the tips of the fourth and of the rib-vein ; the 

 space between the tips of the third vein and of the fork is much more 

 than that between the tips of the fork, and a little more than that 

 between the tips of the second and third veins ; the third vein 

 springs from the rib-vein a little before the latter diverges from 

 the fore border ; the second vein diverges from the third vein, and 

 their mutual distance at the base is about half that at their tips, 

 and much less than the distance between the second and first 

 veins. 



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

 e— -j. England. (In Canada Balsam). From Mr. Walker's collec- 

 tion. 



13. Aphis Quercea. 



Aphis Quercea, Kalt. Mon. Pflan. i. 136, 104. Ratz. Forst. Ins. 

 iii. 218, 21. Walk. Ann. Nat. Hist. Ser. 2, i. 340, 13. 



The rib-vein approaches the fore border very slightly before it 

 diverges thence and encloses the brand ; the latter is rather broad in 

 proportion to its length, and the distance from the angle whence the 

 fourth vein springs to the tip of the rib-vein is about one-third of 

 the length of the brand ; the fourth vein is much curved, more 

 so than that of A. annulata ; it is nearly straight towards the tip, 

 the distance between which and that of the rib- vein is rather less 



