994 LIST OF HOMOPTEEOUS IxNSECTS. 



Var. The viviparous wingless female. Green, elliptical : feel- 

 ers pale yellow, rather less than half the length of the body ; tips 

 brown : mouth pale yellow, with a brown tip : nectaries pale yellow, 

 as long as one-twelfth of the body; tips brown: legs pale yellow, 

 moderately long ; feet and tips of shanks brown. 



The viviparous ivinged female. Small and black: abdomen 

 very dark green, much broader than the chest ; its disk black : feel- 

 ers black, rather shorter than the body : mouth black : nectaries 

 black, as long as one-sixth of the body : legs black, moderately 

 long; fore-thighs dull yellow at the base: wings colourless, very 

 much longer than the body ; wing-ribs pale yellow ; brand pale 

 brown ; veins brown. From Achillea Millefolium, in the beginning 

 of June. 



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

 tion. 



100. Aphis Tanacetina. 



Aphis Tanacetina, Walk. Ann. Nat. Hist. Ser. 2, iv. 46, 92. 



Distance between theiirst and second veins almost twice farther 

 at the tips than at the base ; third hardly farther from the second at 

 the tip than at the base, as far from the second at the base as the 

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

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

 second fork a little nearer to the first than to the fourth vein ; fourth 

 vein slightly curved, a little farther from the tip of the rib-vein than 

 from the second fork. 



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

 tion. 



101. Aphis Ceat^gaeia. 



Aphis Crataegaria, Walk. Ann. Nat. Hist. Se7'.2, vi. 46, 93* 



Distance between the first and second veins at the base about 

 half that between them at the tips ; third nearer to the second at the 

 base than at the tip, a little nearer to the second at the base than 

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

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

 the second ; second fork farther from the first fork than from the 



