Mr. F. Walker's Descriptions of Aphides. 27 



having a metallic tint : the front has a tubercle in the middle 

 and a smaller one on each side : the feelers are black, very often 

 pale green at the base, and much shorter than the body ; the first 

 and the second veins are not angular j the fourth is much shorter 

 than the third ; the fifth is a little shorter than the fourth ; the 

 sixth is much shorter than the fifth ; the seventh is about thrice 

 the length of the sixth : the mouth is dull green ; its tip and the 

 eyes are black : there is a red spot, sometimes obsolete, on each 

 side of the abdomen by the nectaries which are reddish yellow 

 with black tips, and about one-sixth of the length of the body : 

 the legs are black, moderately long, and slightly covered with a 

 white bloom. The young one is comparatively pale, narrow, flat, 

 and linear. 



1st var. Reddish green, mottled with black. 



2nd var. Nearly black. 



The viviparous winged female. This much resembles the pre- 

 ceding form, with the exception of its darker colour, and of the 

 usual difference in structure : the wings are colourless, and much 

 longer than the body ; the first vein hardly diverges more from 

 the second than the latter does from the third ; the third vein 

 has its first fork after one-third, and its second still further 

 beyond two-thirds of its length ; the fourth vein is more curved 

 at its base than towards its tip, and the angle whence it springs 

 is very slight. Length of the body 1 line ; of the wings 3 lines. 



Variation in the wing-veins. The upper division of the second 

 fork is wanting. 



The glutinous matter which covers this species assumes, like 

 that of Aphis Roboris, a fine red colour when mixed with Canada 

 balsam. 



76. Aphis Sambuci, Linn. 



Aphis Sambuci, Linn. Syst. Nat. ii. 734. 4 : Faun. Suec. 998 ; 

 Fabr. Syst. Ins. ii. 384. 3; Ent. Syst. iv. 211. 4; Syst. Rhyn. 

 294. 4; Lister, Ins. 397. 40; Geoff. Ins. i. 495. 3; Frisch. Ins. 

 ii. 14. pi. 18 ; Reaum. Ins. iii. 281-350. pi. 21. fig. 5-15 ; Gmel. 

 ed. Syst. Nat. i. 2202 ; Bonnet, Hist. Nat. i. ; Berk. Syn. i. 110; 

 Stew. El. ii. 110; Turt. ii. 703 ; Schrank, Faun. Boic. ii. 1. 111. 

 1202; Kalt. Mon. Pflan. i. 83. 60. 



Cinara Sambuci, Sir Oswald Mosley, Gard. Chron. i. 827. 



Sambucifex, Amyot, Ann. Soc. Ent. Fr. 2 de serie, v. 477. 



The viviparous wingless female. This is oval, dull, very plump, 

 and of a deep green colour : the sutures of the segments beneath 

 are more distinct than those above : the feelers are slender, seta- 

 ceous, almost white, and about one-third of the length of the 

 body : the mouth is pale green : the eyes are dark brown : the 

 nectaries are dark green, and about one- twelfth of the length of 



