Mr. F. Walker's Descriptions of Aphides. 425 



sect is preserved in Canada balsam : the tips of the joints of the 

 feelers, the feet, and the tips of the shanks are dark brown : the 

 legs are very slender. 



When feeding on Geum urbanum, the common Avens, it is 

 usually more slender than when on the bramble, and the feelers 

 are very much longer than the body. The unborn young ones 

 sometimes amount to thirty in number, but are less numerous 

 in the body of the winged female. 



14th variety. The body is green : the head is yellow : the 

 feelers are black, dull yellow at the base, and very much longer 

 than the body : the eyes are red : the mouth is yellow with a black 

 tip : the nectaries are pale green with brown tips, and longer 

 than one-fourth of the body : the legs are pale yellow ; the feet 

 and the tips of the thighs and of the shanks are black. 



15 th variety. Green, powdered with white : the feelers are 

 yellow, pale green at the base, black towards the tips : the mouth 

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

 pale yellow with black tips, and as long as one-fourth of the 

 body : the thighs are pale green with reddish brown tips ; the 

 shanks are yellow, their tips and the feet are black. 



16th variety. The body is pale yellow with a green stripe 

 along the back : the limbs are white : the feelers are as long as 

 the body ; the tips of the latter joints are black, as are also the eyes 

 and the tip of the mouth : the nectaries have black tips, and are 

 as long as one-sixth of the body : the tips of the feet are black. 



The viviparous winged female. It is pale green : the head and 

 the disc of the chest are buff : the disc of the breast is brown : 

 there are buff bands across the abdomen, and a row of brown 

 spots on each side of it : there is also a dark spot at the tip of 

 the chest or on the base of the abdomen : the feelers are black, 

 pale yellow at the base, and as long as the body : the eyes are 

 red : the mouth is pale yellow with a brown tip : there is often a 

 distinct dark line across the fore-chest : the nectaries are pale 

 yellow, and nearly as long as one-fourth of the body ; their tips 

 are brown : the legs are pale yellow : the knees, the feet, and the 

 tips of the shanks are brown : the wings are colourless and much 

 longer than the body ; the wing-ribs and the rib-veins are pale 

 green ; the wing-brands are pale brown ; the veins are brown and 

 strongly marked : the feelers are usually much longer than the 

 body: the widening of the main vein begins a little before two- 

 thirds of the length of the wing : the brand is irregularly spindle- 

 shaped, and the fourth vein springs from beyond the middle of 

 its hind-border : the third vein approaches very near its source 

 in the main vein before it becomes obsolete ; it is forked before 

 one-third of its length, and again forked before or shortly after 



