426 Mr. ~F. Walker's Descriptions of Aphides. 



two-thirds of its length, but the length of the branches of the 

 second fork is variable. 



1st variety. This is pale and very small : the feelers are thicker 

 than usual till the seventh joint, which is proportionably more 

 slender, and is at least eight times the length of the sixth joint : 

 the veins are very deficient, for in one wing the fourth vein is 

 obsolete long before it reaches the border, and in the other wing 

 the third vein has no second fork, and the lower branch of its 

 first fork is very short, being obsolete before one-third of its way 

 towards the border of the wing. 



2nd var. The body is green : the disc of the chest and that of 

 the breast are pale reddish brown : there is a row of black spots 

 ou each side of the abdomen : the feelers are a little shorter than 

 the body : the mouth is pale green with a brown tip ; the necta- 

 ries are black, and as long as one-fifth of the body : the thighs 

 are pale green with black tips; the feet and the tips of the 

 shanks are also black : the wing-ribs are yellow ; the brands are 

 brown. 



3rd var. Like the preceding, but the disc of the chest and that 

 of the breast are black. 



4th var. The head and the chest are black : the fore-border 

 and the hind-border of the fore-chest and the fore-breast are dull 

 yellow : the abdomen is dull greenish yellow with short broken 

 black bands on its disc, and a row of black dots on each side : the 

 mouth is yellow, its tip and the nectaries are black : the legs are 

 pale yellow ; the feet, the tips of the shanks, and the thighs from 

 the middle to the tips are black : the wing-ribs and the rib-veins 

 are pale yellow ; the brands are dull olive-colour. 



5th var. The body is dull green : the head, the disc of the 

 chest and that of the breast are brown : the feelers are pale 

 green at the base, and a little longer than the body : the eyes are 

 dark red : the mouth and the nectaries have black tips, and the 

 latter are as long as one-fifth of the body : the legs are dull yel- 

 low ; the knees, the feet, and the tips of the shanks are black : 

 the wing-ribs and the rib-veins are pale yellow. 



6th var. The body is grass-green : the disc of the chest and 

 that of the breast are pale brown : the abdomen has a row of very 

 small dark dots on each side : the feelers are brown, green at the 

 base, and as long as the body : the eyes are dark brown : the 

 nectaries are dull green, and between one-fourth and one-fifth of 

 fhe length of the body. 



7th var. While a pupa its colour is bright grass-green : the 

 feelers are pale yellow with brown tips, and are nearly as long as 

 the body : the disc of the chest is pale buff : the nectaries are pale 

 yellow with brown tips : the thighs are pale green ; the shanks 



