Mr. F. Walker's Descriptions 0/ Aphides. 41 



1st of May last contains all that 1 have to say on this subject, I 

 shall not reply to any further comments which Mr. Newport may 

 think proper to publish unsupported by the production of the 

 specimens which he professes to have described. 



I am, Gentlemen, your very obedient servant, 



J. 0. Westwood. 



VII. — Descriptions 0/ Aphides. By Francis Walker, F.L.S. 

 [Continued from vol. iii. p. 304.] 



66. Aphis Urticaria, Kaltenbach. 



Aphis Urticaria, Kalt. Mon. Pflan. 57. 39. 



This is a clustering species, and feeds on Uriica dioica, U, 

 urens, Rubus fruticosus, R. Idceus, and on Stachys sylvatica ? 



The viviparous wingless female. It is small, dark green, ellip- 

 tical or oval, convex, and velvet-like, with a rim on each side ; 

 the front is slightly convex : the feelers are black, dull yellow 

 towards the base, and hardly half the length of the body ; the 

 first and the second joints are not angular ; the fourth is much 

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

 sixth is much shorter than the fifth ; the seventh is nearly as 

 long as the third, and much more slender than the preceding 

 joints : the mouth is dull yellow ; its tip and the eyes are black : 

 the nectaries are pale yellow with black tips, and about one- 

 twelfth of the length of the body : the legs are pale yellow ; the 

 knees, the feet, and the tips of the shanks are black. When 

 young it is sometimes pale greenish or yellowish red, with white 

 limbs. 



1st var. The body is dark grayish red. 



2nd var. Dark green mixed with pale green. 



3rd var. Green, with a yellow head. 



4th var. Dark yellow. 



5th var. Pale yellow. 



6th var. Dark green, mottled with pale yellow and with black. 



7th var. Very dark green, or almost black : the feelers are 

 rather more than half the length of the body : the nectaries are 

 dull green with black tips, and about one-eighth of the length of 

 the body. 



8th var. ? Dull green with a white bloom : the feelers are 

 brownish, pale yellow at the base, and not near half the length 

 of the body : the mouth is dark green : the tip of the abdomen 

 is almost black : the nectaries are very dark green, or almost 

 black, and one-eighth of the length of the body : the legs are 

 pale yellow ; the tips of the thighs are darker ; the feet and the 



