46 Mr, F. Walker's Descriptions of Aphides. 



5tli var. The body is brown : the feelers are blacky and longer 

 than the body : the tip of the abdomen is yellow : the nectaries 

 are black, and rather less than one-fourth of the length of the 

 body : the legs are black ; the thighs from the base to the middle 

 and the shanks except their tips are yellow. 



6th var. The body is dark green : the feelers are dull green at 

 the base and as long as the body : the mouth is green at the 

 base : the legs are pale green ; the feet and the tips of the thighs 

 and of the shanks are black. 



Sometimes green and yellow are variously mixed together in 

 the body ; sometimes it is dull yellow, or pale red, or red with 

 the disc of the abdomen nearly black, and with the thighs black 

 from the middle to the tips, or red with the head green, or green 

 mottled with red, or nearly black, or with a slight metallic tinge. 

 The young ones in the body are sometimes twenty or so in num- 

 ber and of various size : the tubercles Avhich support the feelers 

 are short; the second joint of the feelers is much shorter and 

 narrower than the first ; the third is much more slender than the 

 second. 



The viviparous winged female. It is brown : the lobes of the 

 chest and a row of spots on each side of the abdomen are black : 

 the feelers are black, and a little longer than the body : the mouth 

 is yellow ; its tip and the eyes are black : the nectaries are black, 

 and as long as one-fifth of the body : the tip of the abdomen is 

 yellow : the legs are long and yellow ; the thighs, excepting the 

 base, the feet, and the tips of the shanks, are black : the wings 

 are colourless ; the wing-ribs and the veins are pale yellow ; the 

 wing-brands are pale brown. 



1st var. The body is reddish brown : the fore-border and the 

 hind-border of the fore-chest are paler : the abdomen is dull yel- 

 lowish green with a row of very small black dots on each side : 

 the feelers and the eyes are black, and the former are a little 

 longer than the body : the mouth is dull green with a black tip : 

 the nectaries are a little more than one-fourth of the length of 

 the body : the wing-brands and the veins are brown. 



The thighs ai*e of a deeper black and the shanks of a brighter 

 yellow than those of the wingless female. The red colour of this 

 species becomes much brighter when it is preserved in Canada 

 balsam. The colour of the pupa is more often red than that of 

 the wingless female, and the nectaries of the latter are somewhat 

 shoi'ter than those of the former. 



2nd var. The body is green with a slight bluish tint : the disc 

 of the head and that of the chest and of the bi*east are red : the 

 mouth is dull green with a black tip : the nectaries are as long as 

 one-fourth of the body : the thighs are green towards the base. 

 The structure of the wings does not serve to distinguish this from 

 the preceding species. 



