Mr. F. Walkei-'s Descriptions of Aphides. 447 



tioned in the description of the male indicates the border of the 

 brand. 



The pupa is elhptical, and of a bright yellow colour. 



The winged male. It acquires wings early in October, and its 

 deep red or crimson-coloured pupse may be seen for some time 

 previously feeding here and there among the viviparous and ovi- 

 parous females. The head is broader than the chest : the front 

 is armed with bristles, slightly concave in the middle, and retreat- 

 ing on each side : the eyes are prominent : the feelers are seta- 

 ceouSj and as long as the body ; the fourth joint is much more 

 than half the length of the third ; the fifth is much shorter than 

 the fourth ; the sixth is a little more than half the length of the 

 fifth, and increases in breadth from its base to its tip ; the seventh 

 is rather longer than the fourth, and is much more slender than 

 any of the preceding joints : the fore-chest is rather broad and 

 short ; its length is one-fourth of its breadth ; the sides are con- 

 vex and not notched : the nectaries are not more than one-twentieth 

 of the length of the body : the legs are rather short and stout ; the 

 shanks are very slightly curved : the wings are long and colour- 

 less ; the veins are brown ; the wing-vein does not widen into the 

 brand, but passes along its hind-border which is very slightly 

 curved, and not angular ; it is spindle-shaped ; the veins are 

 strongly marked ; the first and the second branch-veins are near 

 together at the base, the first is straight, the second is slightly 

 curved ; the third is obsolete at its source, and is forked before 

 one-third, and forked again before two-thirds of its length, and 

 it forms two very slight obtuse angles where it casts oft' its forks ; 

 a very slender zigzag line runs along the brand at a short di- 

 stance from its hind-border ; the fourth vein is unusually long. 

 The body is yellow : the feelers, except the base of the third joint, 

 the tip of the mouth, the disc of the chest and that of the breast, 

 and the four hinder thighs, are brown : the eyes are red; the wing- 

 brands are brown. Irregularities in the wing-veins : — 1st, The 

 fourth vein is curved towards its tip. 2nd, The tip of the lower 

 branch of the first fork, and the tips of both branches of the 

 second fork are wanting. 3rd, The lower branch of the second 

 fork is obsolete. 



Length of the body f-l|^ line ; of the wings 2| lines. 



This species may be found from June till October, but is not 

 abundant till the autumn, when the winged female disappears ; 

 but the viviparous wingless female is common in October, the 

 season for the pairing of the male with the oviparous female. 



20. Aphis hirticornis, n. s. 



The viviparous winged female. The body is dull dark buff: the 

 disc of the head and that of the chest are brown : the feelers are 



