Mr. F. Walkei'^s Descriptions of Aphides. 303 



feelers are black, rather thick at the base, and about half the 

 length of the body : the fourth joint is about half the length of 

 the third ; the fifth is shorter than the fourth ; the sixth is much 

 shorter than the fifth, but more than half its length ; the seventh 

 is as long as the fourth : the mouth and the nectaries are black, 

 and the latter are about one-eighth of the length of the body : 

 the thighs and the shanks, especially of the fore-legs, are dull 

 pale yellow towards the base : the wings are colourless, and much 

 longer than the body ; the wing-ribs are pale yellow ; the brands 

 are pale brown, and the veins are darker ; the second vein di- 

 verges from the first, but is nearly parallel to the third, whose 

 first fork is a little after one-third, and its second fork long after 

 two- thirds of its length. 



1st var. The thighs and the shanks are yellow with black tips. 



2nd var. Black : the abdomen has interrupted gray bands 

 above, and is very dark green beneath : the feelers are nearly as 

 long as the body : the ^outh and the nectaries are dark green ; 

 the former has a black tip, and the latter are about one- sixth of 

 the length of the body : the legs are dull buff ; the thighs are 

 pale yellow ; their tips and those of the shanks and the feet are 

 black. 



Variations in the winff -veins. — 1st var. With no second fork in 

 one wing. 



2nd var. The third vein has not two forks, but is divided into 

 three branches. 



The oviparous wingless female. Very small, yellow, narrow, 

 long, spindle-shaped, rather flat, and not shining : there are two 

 green stripes along the whole length of the back : the limbs are 

 pale yellow : the feelers have black tips, and are about half the 

 length of the body : the tip of the mouth, the eyes, and the tips 

 of the nectaries are black, and the latter are as long as one-fourth 

 of the body : the legs are moderately long ; the knees, the feet, 

 and the tips of the shanks are black. 



The winded male. Appears in September and October, and 

 pairs in the latter month with the oviparous female : it is small 

 and black : the borders of the fore-chest and the fore-breast are 

 pale green : the abdomen is green : the feelers are as long as the 

 body : the mouth is pale yellow with a black tip : the nectaries 

 are dull green with black tips, and as long as one-sixth of the 

 body : the legs are pale yellow ; the feet and the tips of the thighs 

 and of the shanks are black : the wing-ribs and the rib-veins are 

 pale yellow ; the wing-brands and the other veins are pale brown. 



1st var. The borders of the fore-chest and the fore-breast are 

 dark green : the abdomen has a row of black spots on each side : 

 the mouth is dull yellow with a black tip : the nectaries are black : 

 the four hinder thighs excepting the base are also black. 



Length of the body f line ; of the wings 2 lines. 



