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



1st var. The back of the pupa is thickly covered with black 

 dots : the head and the fore-chest are bright red ; the rest of the 

 chest is pale red : the abdomen is green, paler beneath. 



2nd var. The body is brown and covered with white powder : 

 the disc of the head and that of the chest are black : the feelers 

 are as long as one-fifth of the body : the mouth is pale brown 

 with a black tip : the legs are black ; the base of the thighs is 

 yellow ; the shanks also are yellow near their base which is 

 black : the wing- ribs and the veins are brown ; the wing-brands 

 are dark brown. 



On Pinus sylvestris, the Scotch pine, during the greater part 

 of the year. 



35. Aphis Pinicola. 



Lachnus Pinicola, Kalt. Mon. Pflan. i. 154. 7. 



Aphis Piniphila, Ratz. Forst. Ins. iii. 219. 26. t. 11. f. 5. 



The viviparous wingless female. The body is of a chocolate 

 colour, with four rows of hoary spots ; the underside is tawny 

 and covered with a white bloom : the feelers are yellow with 

 black tips, filiform, slender, slightly hairy, and less 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 more than half the length of the fifth; the seventh is ex- 

 tremely short : the mouth is black, yellow at the base, and reaches 

 far beyond the hind-hips ; it increases slightly in breadth towards 

 the tip : the eyes are black : the front is convex : the sides of the 

 fore-chest are slightly notched : the nectaries are black, and hardly 

 rise above the surface of the abdomen : the legs are yellow, long, 

 slender, and slightly hairy; the shanks and the second joints of 

 the feet are slightly curved ; the hips, the thighs, the feet, and 

 the shanks from the middle to the tips are black. 



The viviparous winged female. This much resembles the wing- 

 less female, allowing for the usual difference between these two 

 forms : the wings are colourless, and longer than the body ; the 

 brands and the veins are brown ; the rib-vein widens into the 

 brand, which is long and linear ; the angle near its tip resembles 

 that of A. Picece, and is much more obtuse than that of A. Pini; 

 the fourth vein springs from this angle and is nearly straight ; 

 the third vein is obsolete near its source ; it is forked before one- 

 third and again after 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 ; they are near each other at 

 the base, but very far apart at the tips. 



Length of the body 1^-lf line; of the wings 3^-4 lines. 



On Pinus sylvestris, the Scotch pine : very abundant in the 

 autumn. 



