Mr. F. Walkei-^s Descriptions of Aphides. 43 



half the length of the body : the mouth is paler towards the base : 

 the nectaries are about one-tenth of the length of the body : the 

 legs are dull white ; the knees, the feet, and the tips of the shanks 

 are black ; the hind-legs are dark gray, and are very broad. In 

 the beginning of November. 



The winged male. The body is black : the fore-border and the 

 hind-border of the fore-chest are very dark yellow : the feelers 

 are black, rather thick till near their tips, and nearly as long as 

 the body : the mouth is black, dark yellow tow^ards the base : the 

 nectaries are black, and full one-sixth of the length of the body ; 

 the legs are black ; the fore-thighs are dark yellow at the base : 

 the wings are slightly gray, and very much longer than the body ; 

 the wing-ribs are yellow ; the brands are pale brown ; the veins 

 are brown. It appears in the beginning of November, and then 

 pairs with the yellow female before mentioned. 



Length of the body i-| line ; of the wings l|-2 lines. 



In the spring these Aphides dwell in clusters on the stalks of 

 the guelder rose buds which open and inclose them with a snowy 

 drapery; in the autumn they multiply when the tree is adorned 

 with clusters of red shining berries ; and November, when the 

 leaves assume a bright scarlet hue, is the egg-laying epoch. The 

 leaves of the wayfaring tree on which it feeds in the spring curl 

 up, and protect it from injury. 



87. Aphis Xylostei, Schrank. 



Aphis Xylostei, Schrank, Faun. Boic. ii. 1. 107 ; Reaum. Ins. 

 iii. 286; Deg. Ins. iii. 96. 16. pi. 7. fig. 8-13; Gmel. ed. Syst. 

 Nat. i. 2210; Fonscol. Ann. Soc. Ent. x. 167. 6. 



A. Lonicerce, Sir Oswald Mosley, Gard. Chron. i. 628. 



Xylosthaphis, Amyot, Ann. Soc. Ent. Fr. 2^^ serie, v. 479. 



The viviparous wingless female. The body is small, oval, rather 

 flat, pale green, covered with white powder : the head is darker : 

 the feelers are very pale, but darker at the base and at the tips, 

 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 tube at the tip of the abdomen is 

 pale yellow : the legs are pale yellow ; the hips and the hind- 

 thighs are darker ; the feet and the tips of the shanks are black. 



1st var. The thighs are nearly all black. 



The viviparous winged female. The body is green : the head, 

 the chest, the breast, the feelers, the nectaries, and the legs are 

 black; the shanks and the fore-thighs excepting their tips are 

 pale yellow. 



88. Aphis Cerasina, n. s. 



The viviparous wingless female. The body is rather small, 

 elliptical, flat, greenish yellow with two irregular black lines on 



