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



appear before the middle of the body : the front is convex : the 

 feelers are black, hairy, filiform, tawny at the base, and hardly 

 more than one-fourth of the length of the body ; the fourth joint 

 is rather more than half the length of the third ; the fifth is much 

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

 seventh is very short : the mouth is black, tawny at the base, and 

 reaches nearly to the hind-hips : the front is convex : the nec- 

 taries are black, and rise very little above the surface of the abdo- 

 men : the legs are black, hairy, stout, and moderately long ; 

 the shanks and the second joints of the feet are very slightly 

 curved. 



1st var. When young it is dull green ; the feelers are tawny 

 with brown tips : when full-grown it is dark green with a brassy 

 tinge. 



2nd var. The body is of a pale flesh-red colour, thickly covered 

 with white powder : the limbs are white, with the exception of the 

 base of the feelers and of the thighs which are yellow. 



The viviparous winged female. This form acquires wings soon 

 after the middle of May : it is then black and hairy : the fore- 

 border and the hind-border of the fore-chest and the abdomen 

 are dull red : the feelers are dull brown, hairy, filiform, and less 

 than half the length of the body : the mouth is pale red with a black 

 tip, and reaches the hind-hips : the nectaries are black, and about 

 one-twentieth of the length of the body \ the base of each is 

 encircled with a large black spot : the legs are black ; the base of 

 the thighs is dull yellow : the wings are colourless, and longer 

 than the body ; the wing-ribs are yellowish brown ; the rib-veins 

 and the brands are dark brown ; the other veins are pale yellow ; 

 the rib-vein widens into the brand before half the length of the 

 wing; the brand is long and linear, its tip is very obtuse, and the 

 hind-border there forms almost a right angle ; the fourth vein is 

 long and straight ; the third vein is very slender ; it is forked a 

 little before one-third and again before two-thirds of its length ; 

 the angles formed by these forks are very acute ; the tip of the 

 upper branch of the second fork is very near the tip of the fourth 

 vein ; the first and the second veins are almost straight j they are 

 near each other at the base, but very far apart at the tips. 

 Length of the body \\ line ; of the wings 4 lines. 



41. Aphis submacula, n. s. 



The viviparous winged female. The body and the limbs are black 

 and hairy : the feelers are filiform, and rather more than half the 

 length of the body ; the fourth joint is much less than half the 

 length of the third ; the fifth is much longer than the fourth ; the 

 sixth is a little shorter than the fifth ; the seventh is extremely 

 short ; the front is convex : the nectaries hardly rise above the 



