Mr. F. Walker's Descriptions of Aphides. 257 



are black : the black spots on the abdomen arc confluent and 

 form bands. 



6th variety. Pale green ; the tips of the feelers are gray ; the 

 sixth joint is longer than the fifth, and the last character is com- 

 mon to this female during the summer and the autumn : the feet 

 and the tips of the shanks are black : the wings are much longer 

 than the body. In the middle of June. 



7th variety. The pupa is pale yellowish green : the winged in- 

 sect is bright yellow, and often thickly covered with white bloom : 

 the middle chest and the middle breast are buff : the feelers are 

 black and longer than the body, at the base they are pale green 

 or pale yellow, and the latter colour sometimes extends along 

 their whole length with the exception of the tip of each joint : 

 the mouth is pale green or pale yellow ; its tip is black : the legs 

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

 are black ; the thighs are sometimes pale green with black tips. 

 In the beginning of July. 



8th variety. Like the preceding, but with a black stripe on the 

 middle of the head, and a black spot on each side : there is also 

 a brown stripe along the fore-chest : the middle chest and the 

 middle breast are black. 



9th variety. Like the preceding, but the middle chest is red, 

 and its disc is black : there are two large oblong-quadrate deep 

 black spots on the back of the abdomen. 



10th variety. The pupa is pale yellowish green, or pale yellow 

 with irregular lively green spots along each side of the abdomen : 

 the chest of the winged insect is tawny, and marked with black, 

 and there is a large irregular subquadrate black spot on the middle 

 of the abdomen. At the end of August. 



11th variety. Yellow: the head and the fore-chest are green, 

 and each of them has a black line along its hind-border : the 

 middle chest and the wing-ribs are orange ; the shield is black, 

 and there are two or three black spots on the back of the abdo- 

 men : the wing-brands are pale yellow. 



12th variety. Like the preceding, but the middle chest and 

 the middle breast are bright flesh-colour and marked with black : 

 the whole of the wing-border is orange. 



13th variety. The pupa is bright orange : the head, the fore- 

 chest and the limbs are pale yellow : the eyes, the tips of the 

 feelers and the tip of the mouth are black. In the beginning of 

 October. 



14th variety. The body is of a dark colour : the feelers are 

 much shorter than the body, and sometimes not more than half 

 its length : the wings are also short. At the end of May. 



There are other but less distinct varieties. 



On the front of the pupa there are bristles, which disappear 



