24 Mr. F. Walker's Descriptions 0/ Aphides. 



white bloom beneath : the feelers are black, and a little shorter 

 than the body ; the fourth joint is a little shorter than the third > 

 the fifth is as long as the fourth; the sixth is much shorter than the 

 fifth, but more than half its length ; the seventh is longer than 

 the fifth : the mouth is dark green ; its tip and the eyes are black : 

 the nectaries and the legs are black ; the former are nearly one- 

 fifth of the length of the body ; the shanks except their tips and 

 the four hinder thighs from the base to the middle are yellow : 

 the wings are much longer than the body ; the wing-ribs are pale 

 yellow ; the brands are dull yellow ; the veins are brown. On 

 Genista anglica during the summer. 



8th var. Like the preceding, but the fore-thighs and the fore- 

 shanks are dull yellow with black tips ; the four hinder shanks 

 are pale yellow with black tips : the wing-brands are brown. 



9th var. While a pupa it is gray : the abdomen is black, with 

 three interrupted white bands, and has also four white spots near 

 the tip : the rudimentary wings are dull green. 



10th var. The body is small, and black : the feelers are longer 

 than the body : the eyes are red : the nectaries are as long as one- 

 sixth of the body : the legs are yellow ; the thighs from the mid- 

 dle to the tips, the feet, and the tips of the shanks, are black : 

 the wing-ribs and the rib-veins are pale yellow ; the wing-brands 

 and the other veins are pale brown. 



11th var. The body is black, stout, and shining: the feelers 

 are much shorter than the body : the mouth is pale yellow ; its 

 tip and the eyes are black : the nectaries are black, and about 

 one-sixth of the length of the body : the legs are pale yellow ; the 

 hind-thighs except the base, the feet, and the tips of the other 

 thighs and of the shanks, are brown : the wing- ribs and the 

 brands are dull yellow; the veins are brown. On Rumex crispus. 

 While a pupa the legs are black ; the fore-thighs are yellow at 

 the base : the rudimentary wings are dark green. 



12th var. The four hinder thighs are quite black. 



13th var. The body is deep black : the feelers are black, and 

 shorter than the body : the eyes and the mouth are black ; the 

 base of the latter is dull white : the nectaries are black, and as 

 long as one-eighth of the body : the four hinder thighs, the feet, 

 the knees, and the tips of the shanks are black : the wing-ribs 

 are pale yellow ; the brands are pale green ; the veins are pale 

 brown. 



14th var. With a row of white spots on each side of the back. 



15th var. Like the last, but the feelers are much shorter than 

 the body : the mouth is dark green at the base : the nectaries 

 are as long as one-tenth of the body : the legs are black ; the 

 fore-thighs at the base, and the shanks excepting their tips are 

 dull yellow : the ^^^ng-ribs and the brands are brown. 



