120 Mr. F. Walker's Descriptions of Aphides. 



body : the mouth is pale yellow ; its tip and the eyes are black : 

 the nectaries are dull green with black tips^ and as long as one- 

 sixth of the body : the legs are pale yellow ; the knees, the feet, 

 and the tips of the shanks are black. 



1st var. The body is yellow, velvet-like, mottled with green : 

 the feelers are yellow with black tips, and much shorter than the 

 body : the nectaries are dull yellow with black tips, and as long 

 as one-eighth of the body. 



2nd var. The body is of a delicate green colour ; the head is 

 tinged with yellow : the feelers are yellow with brown tips, and 

 rather less than half the length of the body : the mouth and the 

 nectaries are yellow with brown tips, and the latter are as long 

 as one-tenth of the body : the legs are yellow ; the knees, the 

 feet, and the tips of the shanks are brown. 



The viviparous winged female. While a pupa it resembles the 

 wingless female in colour, but the rudimentary wings are very 

 dark green ; it is sometimes yellow with interrupted green stripes 

 on the back : the feelers are white with black tips and longer 

 ' than the body : the mouth is white ; its tip and the eyes are 

 black : the legs also are white with darker feet. 



98. Aphis Humulij Schrank. 



Aphis Humuli, Schrank, Faun. Boic. ii. 110. 1199; Kalt. Mon. 

 Pflan. i. 36. 24. 



A. Pruni Mahaleb, Fonscol. Ann. Soc. Ent. Fr. x. 



Humulifex, Amyot, Ann. Soc. Ent. Fr. 2^^ serie, v. 477. 



It feeds on Prunus spinosa, P. Mahaleb, and on Humultis lu- 

 pulus. 



The viviparous wingless female. The body is rather long, nar- 

 row and fiat, in shape between an oval and an ellipse, pale green- 

 ish yellow, with a vivid green stripe on the back, and a row of 

 spots of the same colour on each side : the feelers are very pale 

 yellow, darker towards the tips, and rather more than half the 

 length of the body : the eyes are dark red : the mouth is pale 

 yellow with a brown tip : the nectaries are very pale yellow, and 

 rather more than one-fifth of the length of the body : the legs 

 are pale yellow or greenish yellow, and rather long ; the tips of 

 the feet are darker. 



99. Aphis Prunina, n. s. 



The viviparous wingless female. The body is nearly elliptical, 

 convex, thick, highly arched, grass-green, smooth, shining : the 

 feelers are setaceous, pale yellow, darker towards their tips, and 

 about one-third of the length of the body; the fourth joint is 

 much shorter than the third, but more than half its length ; the 

 fifth is shorter than the fourth : the sixth is a little shorter than 



