Mr. F. Walker's Descriptions 0/ Aphides. 343 



4th variety. Feelers not more than half the length of the body. 



On each side of the abdomen there is a bundle of white floe- 

 cose matter like spun -glass ready to be used, as is said, as wrap- 

 pers for the eggs when they are laid ; these eggs are four or live 

 in number, of an orange colour, which they communicate to the 

 half-transparent body. 



Length of the body 1 line ; of the wings 2| lines. 



The winged male. Its colour does not differ from that of the 

 winged female : it lives in October and November, and then pairs 

 with the wingless female. 



15. Aphis Juglandicola. 



Lachnus Juglandicola j Kalt. Mon. Pflan. i. 151. 4. 



The viviparous wingless female. Appears in July ; it is yellow, 

 oval, flat, and hairy : the feelers are not quite one-fourth of the 

 length of the body. 



The viviparous winged female. This dwells on the underside of 

 the leaves of Juglans regia, the walnut-tree, from July to October : 

 while a pupa it is yellow, flat, hairy, nearly elliptical, and has two 

 rows of brown spots along the back ; there are usually seven 

 spots, often less, bat very rarely more, in each row : the front is 

 broad, convex between the eyes and prominent in the middle : 

 the limbs are pale yellow : the feelers are not more than one- 

 fourth of the length of the body ; the tips of their joints and the 

 tip of the mouth are brown. When winged it is yellow : the 

 feelers are less than half the length of the body ; the tips of the 

 joints are brown ; the third joint is long ; the fourth is much 

 shorter than the third; the fifth is hardly shorter than the 

 fourth ; the sixth is much shorter than the fifth ; the seventh is 

 extremely short and about one-fourth of the length of the sixth : 

 there are no tubercles at the base of the feelers : the eyes are red : 

 the nectaries are extremely short : the legs are yellow, and there 

 is a brown spot near the tip of each hind-thigh : the wings are 

 colourless ; the wing-ribs and the rib-veins are yellow ; the wing- 

 brands are colourless ; the base of each branch-vein and the tips 

 of the rib-veins are slightly clouded ; the first and the second 

 branch-veins descend abruptly to the hind-border of the wing, 

 as in Betulicola, Alniy &c. ; these veins become very faint as they 

 approach the hind-border. 



1st variety. A spot on the tip of each of the middle thighs. 



2nd variety. The wing-brands slightly clouded. 



3rd variety. A brown spot on each side of the back of the ab- 

 domen. 



4th variety. Body yellow intermingled with orange. 



5th variety. Body orange. 



The body is rather short and broad : the front of the head and 



