300 Mr. F. Walker^s Descriptions of Aphides. 



yellow with black tips, and^bout one-third of the length of the 

 body : the feet are black. 



The viviparous winged female. While a pupa it resembles the 

 wingless female in colour, and the rudiments of its wings are 

 white, but when these organs are unfolded it is pale greenish 

 yellow : the feelers are black, pale green at the base, and as long 

 as the body : the fourth joint is much less than half the length 

 of the third ; the fifth is shorter than the fourth ; the sixth is as 

 long as the fifth ; the seventh is as long as the fourth : the eyes 

 are dark red : the mouth is pale green ; its tip is black : the disc 

 of the chest and that of the breast are dark green : the abdomen 

 is very pale yellow with transverse broken bright green bands : 

 the nectaries are pale yellow, and nearly one-sixth of the length 

 of the body ; their tips are black : the legs are pale greenish yel- 

 low, long and slender ; the knees, the feet, and the tips of the 

 shanks are black : the wings are colourless, and much longer 

 than the body ; the wing-ribs and the rib-veins are pale yellow, 

 the wing-brands are nearly colourless : the veins are brown ; the 

 first and the second veins diverge, but the second and the third 

 are nearly parallel to each other ; the first fork of the third vein 

 is a little before one-third and the second after two-thirds of its 

 length ; the fourth vein is much curved, and the angle of the 

 brand whence it springs is very slight. 



1st var. Dull yellowish green : the feelers are brown, white 

 towards the tips : the disc of the chest and that of the breast are 

 black : the abdomen is pale yellowish green, and on its disc there 

 are a few small green marks and one large square dark green spot : 

 the nectaries are pale yellowish green, and nearly one-fourth of 

 the length of the body ; their tips are black : the wing-brands are 

 very pale brown. 



2nd var. Pale greenish white : the feelers are much longer 

 than the body ; their tips are white : the discs of the head, of the 

 chest and of the breast are brown or black, and there is also a 

 brown or black spot on each side of the chest : the abdomen is 

 traversed by black bands ; the first and the second are narrow ; 

 the third and the fourth are broad : the eyes are dark brown : 

 the nectaries are nearly white, and not more than one-tenth of 

 the length of the body : the legs are pale yellow ; the tips of the 

 thighs are brown ; the feet and the tips of the shanks are black : 

 the wing-ribs are white ; the wing-brands are gray ; the veins 

 are black. The pupa is all white except the eyes and the feet 

 which are brown. 



3rd var. While a pupa the chest is bufi\, and the rudimentary 

 wings are white. 



4th var. While a pupa it is pale greenish yellow or pale saffi-on, 

 long-elliptic, rather flat, smooth, not shining : there is a green 



