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



angle ; it is not widened into a distinct brand, though that part 

 of the wing is yellow, and clouded at the base and at the tip ; 

 the branch-veins are not straight ; their tips are clouded ; the 

 first vein is not so perpendicular as in Aphis Alni and other 

 species ; the third vein is distinct till very near its source ; it is 

 forked some way after one-third of its length, and forked again 

 long after two-thirds of its length; the fourth vein is very di- 

 stinct along its whole length. 



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



A single specimen found on the walnut near London, August] 

 3rd, 1847. 



11. Aphis Coryli, Gotze. 



Aphis Coryli, Gotze, Ent. Bcitrage, ii. 311; Sir Oswald Mosley^ 

 Gardener's Chronicle, i. ; Kalt. Mon. Pflan. i. 98. 73. 



This delicate little Aphis feeds on the hazel {Corylus Avellana), 

 on the hornbeam {Caipinus Betulus), and, as Kaltenbach states, 

 on the ash [Fraxinus excelsior). 



The viviparotis wingless female. This appears beneath the leavea 

 at the end of March or later : it is then pale green, bristly, and 

 rather long and narrow : there are four rows of brown spots along 

 the body, and a bristle comes forth from each spot : the feelers 

 are brown, and nearly one-half the length of the body : the eyes 

 and the tip of the mouth are brown : the nectaries are extremely 

 short : the legs are pale green. 



1st variety. The feelers and the legs are dark dull green. 



The viviparous winged female. This, while a pupa, at the end 

 of April, has a citron or pale yellow colour : there are four rows 

 of tubercles along the back, which is thickly covered with brown 

 bristles : the eyes are red : the feelers are full half the length of 

 the body ; the tips of their joints and the feet are brown. The 

 wings are unfolded in the middle of May, and the insect has 

 then a beautiful citron colour : the tips of the feelers, the tip of 

 the mouth, the feet, and the tips of the shanks are brovvTi : the 

 feelers are as long as or a little longer than the body ; the foui-th 

 joint is a little shorter than the third ; the fifth is much shorter 

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

 seventh is as long as the fifth : the wings are colourless ; the wing- 

 ribs and the wing-brands are pale yellow, and there is a small 

 brown spot on each of the latter ; the veins are also pale yellow, 

 and their tips are slightly clouded : the first branch-vein is some- 

 what perpendicular to the wing-rib, as in ^. Alni, &c. The front 

 is prominent : the sides of the fore-chest are notched : the legs 

 are moderately long ; the fore-legs are but little shorter than the 

 hind-legs : the main wing-vein does not widen into a brand ; it 

 is very slightly inclined inwards and outwards, forming a very ob- 



