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



is black, and nearly as long as the body : the lobes of the chest 

 are strongly marked : the nectaries hardly rise above the surface 

 of the abdomen : the legs are black and not hairy ; they are very 

 long, especially the hind-legs ; the thighs except their tips, the 

 fore-shanks and the middle-shanks from the base to the middle, 

 and the hind-shanks at the base, are red ; the shanks are very 

 slightly curved : the wings are very much longer than the body, 

 and tinged with brown, but they are colourless towards the base ; 

 the wing-ribs and the wing-brands are black ; the veins are paler ; 

 the base of the fore-border of the wing is convex ; the brand is 

 linear and very long, and occupies rather less than half the 

 length of the wing ; it terminates abruptly, forming nearly a right 

 angle from whence springs the fourth vein which is long and 

 straight ; the third vein is obsolete near its source ; it is forked 

 before one-third and forked 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 2J lines ; of the wings 7 lines. 



This species feeds on Abies Picea, the silver fir, and on A. ex- 

 celsa, the spruce fir ; it occurs near London in the middle of June, 

 and I have found it in abundance on the Alps of Switzerland. 



34. Aphis Pini, Linn. 



Aphis Pini, Linn. Syst. Nat. ii. 796. 21 ; Gmel. ed. Syst. Nat. 

 i. 2207 j Faun. Suec. 994 ; Fabr. Mant. Ins. ii. 317. 44 j Sp. Ins. 

 ii. 389. 39; Ent. Syst. iv. 219. 44; Syst. Ehyn. 300. 44 ; Rossi, 

 Faun. Etrusc. 264. 1396. 



A. nuda Pini, Deg. Ins. iii. 18. 1. t. 6. f. 1-14. 



Lachnus Pini, Kalt. Mon. Pflan. i. 155. 8. 



Pityaphis, Amyot, Ann. Soc. Ent. Fr. 2 me serie, v. 482. 



The viviparous wingless female. It is stout and active, and runs 

 fast : the body is flat, subquadrate, hairy, smooth and shining, 

 and thickly covered with very small black dots : the head is pale 

 red : the chest is yellow : the abdomen is green : the front of the 

 head is convex : the feelers are yellow, hairy, and less than half 

 the length of the body ; their tips are black ; the fourth joint is 

 more than half the length of the third ; the fifth is longer than 

 the fourth ; the sixth is about half the length of the fifth ; the 

 seventh is extremely short : the eyes are black and prominent : 

 the mouth is tawny, and reaches beyond the hind-hips ; its tip is 

 brown ; the first joint is linear ; the second, third and fourth 

 joints are formed like a spindle which is shorter than the first 

 joint : the nectaries are dull red, and like tubercles on the surface 

 of the abdomen : the legs are tawny, hairy, long, and stout ; the 



