42 Mr. F. Walker's Desci-iptions of Aphides. 



body. The body is elliptical, convex, plump, velvet-like, very 

 dark olive-green, and covered with a white bloom : the feelers are 

 black, pale yellow at the base, and not more than one-fom'th of 

 the length of the body : the nectaries are not more than one- 

 twelfth of the length of the body : the legs are black, short and 

 stout; the shanks except their tips are pale yellow. In the 

 middle of April it may often be seen sitting under a leaf sur- 

 rounded by its offspring, which have comparatively pale and flat 

 bodies : it disappears in the beginning of July, and returns again 

 in the autumn. 



1st var. The body is black. 



The viviparous winged female. While a pupa the body is black, 

 and has a row of transverse white spots on each side of the ab- 

 domen : the feelers are more than half the length of the body : 

 the nectaries are about one-tenth of the length of the body : the 

 legs are moderately long ; the fore-thighs and the shanks except 

 their tips are white : the wings are unfolded before the middle 

 of May, and are, as usual, at first milk-white, and afterwards 

 become colourless, and very much longer than the body; the 

 wing- ribs are very pale green, or almost white ; the brands are 

 dull buff; the veins are pale brown. 



1st var. The body is black : the feelers are rather shorter than 

 the body; the mouth is dull yellow towards the base: the nectaries 

 are about one-sixth of the length of the body : the shanks are 

 very dark yellow with black tips ; the fore-thighs are yellow at 

 the base : the wings are slightly tinged with gray ; the wing-ribs, 

 the brands, and the veins are brown. 



The oviparous wingless female. The body is elliptical, convex, 

 shining, pale yellow : the feelers are pale yellow, black towards 

 the tips, and rather less than half the length of the body : the 

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

 are black, and hardly one-sixth of the length of the body : the 

 legs are pale yellow; the knees, the feet, and the tips of the 

 shanks are black ; the hind-shanks are broad. 



1st var. The body is tinged with green. 



2nd var. The body is tinged with red. 



3rd var. The body is pale red. 



4th var. With six rows of black spots on the back. 



5th var. With a large red spot at the base of each nectary. 



6th var. The head is pale gray. 



7th var. The hind-shanks are pale brown. 



8th var. The tip of the abdomen is black. 



The oviparous wingless female ? The body is small, oval, slightly 

 convex, very deep black with a slight white bloom, and it has a 

 rim on each side of the body : the abdomen is tapering towards 

 the tip : the feelers are black, white towards the base, and full 



