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 f 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. Beitrage, 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 (Carpinus Betulus), and, as Kaltenbach states, 

 on the ash (Fraxinus excelsior). 



The viviparous wingless female. This appears beneath the leaves 

 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 brown : the 

 feelers are as long as or a little longer than the body ; the fourth 

 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 A. 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- 



