1018 H8T OF HOMOPTEllOUS INSECTS. 



Distance between the first and second veins about tbrice farther 

 at the tips than at tlie 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 mueli 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 thibulis. 

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

 England. 



203. Aphis tbanslata. 

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

 England. 



203. Aphis indccta. 

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

 England. 



204. Aphis inoumbens. 

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

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



205. Aphis imi'acta. 



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

 England. 



