388 Mr. F. Walker’s Descriptions of Aphides. 
XXXVI.—Descriptions of British Aphides. 
By Francis Watxer, F.L.S. 
[Continued from p. 281. ] 
82. Aphis Pruni. 
Aphis Pruni, Fabr. Ent. Syst. iv. 218. 14; Syst. Rhyn. 296. 
14; Gmel. ed. Syst. Nat. 1. 2202; Geoffr. Ins. 1. 497. 10; De- 
geer, Ins. i. 49. 5. t. 2. f. 1-8; Reaum. Ins. 11. t. 23. f. 9-10; 
Scopoli, Ent. Carn. 1388. 406; Rossi, Faun. Etr. 260. 1874; 
Stew. El. nu. 110; Turt. n. 704; Schrank, Faun. Boie. ii. 115. 
1217; Gotze, Ent. Beitr. 1. 3812; Latr. Gen. Cr. i. 173; St. 
Farg. et Serv. Encycl. x. 245; Kaltenbach, Mon. Pflan. 1. 52. 37; 
Ratz. Forst. Ins. mi. 216. 
A. Arundinis, Fabr. Syst. Ins. 885. 7; Ent. Syst. iv. 212. 8; 
Syst. Rhyn. 295.8; Gmel. ed. Syst. Nat. 1. 2202; Kalt. Mon. 
Pflan. 1. 54. 38. 
Prunifex, Amyot, Ann. Soc. Ent. Fr. 24 série, v. 476. 
Calamaphis, Amyot, Ann. Soc. Ent. Fr. 2 série, v. 477. 
The viviparous wingless female. This Aphis dwells beneath the 
leaves of the plum-tree (Prunus domestica), and is said to feed also 
on P. spinosa and on P. Armeniaca, from the middle of June 
to the end of October. It exudes much floccose matter with 
which the leaves on which it feeds are covered ; the body is light 
green, elliptical, long, narrow, and thickly covered with white. 
powder: the limbs are white: the feelers have brown tips, and 
are much shorter than the body: the tip of the mouth, the feet, 
and the tips of the shanks are brown, and the eyes are darker: 
the nectaries are pale green with black tips, and about one- 
twentieth of the length of the body: the front is rather narrow, 
and nearly straight : the first and second joints of the feelers are 
not angular; the fourth joimt is very much shorter than the 
third; the fifth is a little shorter than the fourth; the sixth is 
’ much shorter than the fifth ; the seventh is more than twice the 
length of the sixth. It also sometimes appears in abundance on 
Arundo Phragmitis and on A. Epigyos, and it assumes there a 
variety of tints, which will be mentioned when its history is more 
fully detailed. 
The viviparous winged female. The pupa much resembles the 
larva, but is shorter, and the tips of the rudimentary wings are 
pale brown. The winged Aphis is also light green, and very 
much covered with white powder: the head, the middle chest, 
and the middle breast are black or gray: the feelers have the 
same colours, and vary in length, being a little shorter or much 
shorter than the body; the fourth joint is more than half the 
length of the third; the fifth is shorter than the fourth; the 
sixth is much shorter than the fifth; the seventh is more than 
