Mr. F. Walker's Descriptions of Aphides. 17 



4th far. The body is black : the abdomen is dark reddish 

 green. 



Variations of the wing-veins. 1st van — There is no upper 

 branch in the first fork of the third branch-vein, but the lower 

 branch is subdivided. 



2nd var. There is no second fork. 



3rd var. The lower division of the second fork sends forth an 

 additional branch which does not reach the border of the wing. 



The oviparous wingless female, This appears in October, and is 

 bright reel and velvet-like, slightly oval, rather convex : the head 

 is black : the disc of the abdomen is dark red : the feelers are 

 black, white towards the base and as long as the body : the nec- 

 taries are white, with black tips : the legs are white ; the tips of 

 the thighs are pale brown ; the feet and the tips of the shanks 

 are black. 



The winged male. The body is black : the abdomen is dark 

 yellowish red, with a row of black spots on each side : the feelers 

 are black, and as long as the body : the month is dull yellow,, 

 black towards the tip : the nectaries are pale yellow with black 

 tips, and as long as one-fourth of the body : the thighs are black, 

 pale yellow at the base ; the shanks are dark reddish yellow, 

 their tips and the feet are black : the wing-ribs and the rib-veins 

 are pale yellow ; the brands are pale brown ; the veins are brown. 



1st var. The abdomen is dark red. 



2nd var. The disc of the abdomen is blackish. 



3rd var. The abdomen is very dark green, almost black above : 

 the feelers are longer than the body ; the fourth joint is much 

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

 sixth is less than half the length of the fifth ; the seventh is 

 longer than the fourth, and thick till near their tips : the base 

 of the mouth is dull yellow : the nectaries are as long as one-sixth 

 of the body : the thighs at the base and the shanks except their 

 tips are yellow. It pairs with the oviparous female at the end 

 of October and in the beginning of November. 



Length of the body }-l£ line ; of the wings 2^—4^- lines. 



The wingless and the winged females as usual appear alter- 

 nately, and the peach-tree sometimes loses all its leaves from 

 their ravages. Formica nigra is almost constantly attracted by 

 it on the peach-tree; but when it swarms on the sloe in hedges, 

 its original condition, large troops of Formica ntfa come to feed 

 on its honey. 



73. Aphis Rumicis, Linn. 



Aphis Rumicis, Linn. Syst. Nat. ii. 734. 5 ; Faun. Suec. 979 ; 

 Fabr. Syst. Ins. ii. 385. 11 ; Syst. Ent. 735. 10; Ent. Syst. iv. 

 213. 12 ; Syst. Rhyn. 296. 12; Schrank, Faun. Boic. ii. 1. 111. 



Ann. $ Mag. N. Hist. Ser. 2. Vol. v. 2 



