1018 LIST OF HOMOPTEROUS INSECTS. 



Distance between the first and second veins about thrice farther 

 at the tips than at the base ; third vein a little farther from the se- 

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

 second than the second is from the first ; first fork nearer to the se- 

 cond fork than to the third vein, hardly nearer to the third vein than 

 the third is to the second ; second fork much nearer to the fourth 

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

 almost straight towards the tip, twice farther from the tip of the 

 rib-vein than from the second fork. 



Var. Third vein with a fork near its tip. 



Var. Third vein not farther from the second at the tip than at 

 the base, twice farther at the base from the second than the second 

 is from the first. 



a, b. England. Presented by F. Walker, Esq. 



201. Aphis tribulis. 



Aphis tribulis, Walk. Zool. vii. App. xxxiv. 

 England. 



202.^ Aphis translata. 



Aphis translata, Walk. Zool. vii. App. xxxv. 

 England. 



203. Aphis inducta. 



Aphis inducta, Walk. Zool. vii. App. xxxv. 

 England. 



204. Aphis incumbens. 

 Aphis incumbens, Walk. Zool. vii. App. xxxv. 

 a. England. Presented by F. Walker, Esq. 



205. Aphis impacta. 

 Aphis impacta, Walk. Zool. vii. App. xxxv., xlvii. 

 England. 



