Mr. F. Walker's Descriptions of Aphides. 423 



Variations in the wing-veins. The upper branch of the second 

 fork is obsolete except at its tip where it joins the wing-border. 

 The front is rather narrow, and has on each side of it a tuber- 

 cle on which the feelers are seated ; its tip is rather oblique : the 

 first joint of the feelers is slightly curved, and is narrower and a 

 little shorter than the tubercle which supports it ; the second is 

 more than half the length and the breadth of the first ; the third 

 is much narrower than the second ; the fourth is a little shorter 

 than the third ; the fifth is a little shorter than the fourth ; the 

 sixth is rather more than one-third of the length of the fifth ; the 

 seventh is full as long as the third : the fore-chest is rather long, 

 narrower in front, convex on each side : the nectaries decrease in 

 thickness from the base to the tips : the legs are long and slender ; 

 the shanks and the second joint of the feet are curved. The 

 space between the first and the second forks of the third wing- 

 vein is variable as to length in this species. 



The winged male. The body is black : the feelers are longer 

 than the body : the eyes are dark red : the nectaries are nearly 

 one-fourth of the length of the body : the legs are long ; the base 

 of the fore-thighs is yellow : the wing-ribs and the rib-veins are 

 also yellow ; the wing-brands are very pale brown ; the other veins 

 are brown. 



1st var. Black : the fore-border, the hind-border, and the 

 underside of the fore-chest are reddish brown : the abdomen has 

 the same colour : its disc is black, and it has a row of black spots 

 on each side : the mouth is dull yellow with a black tip : the nec- 

 taries are about one-fifth of the length of the body : the base of 

 the thighs is pale yellow ; the shanks except their tips are dark 

 yellow. 



2nd var. Brown : the sides of the chest and the abdomen are 

 yellow ; the latter has a broad brown stripe along the middle, and 

 a row of black dots on each side : the mouth and the nectaries 

 are yellow with black tips, and the latter are as long as one-fourth 

 of the body : the legs are dull yellow ; the knees, the feet, and the 

 tips of the shanks are black. 



50. Aphis Rubi, Kaltenbach. 



Aphis Rubi, Kalt. Mon. Pflan. i. 24. 12. 



This species feeds on Rubus ccesius, R. fruticosus, R. corylifo- 

 lius, R. discolor, R. Idceus, Geum urbanum, and other species of 

 that genus, and on Epilobium montanum. The young ones in the 

 body of the wingless female sometimes amount to twenty and 

 upwards, of various sizes. 



The viviparous wingless female. Light green, oval, convex, 

 shining, more or less tinged with yellow towards the head : the 

 feelers are brown, pale green at the base, and a little longer than 



