Mr. F. Walker^s Descriptions of Aphides. 331 



thick, elliptical ; the front is slij^htly convex and very broad, and 

 there are no spines between the feelers : the feelers are black, 

 stout, and much longer than the body ; the first and the second 

 joints are thick and dark brown ; the third is rather short ; the 

 fourth is as long as the third ; the fifth is a little longer than the 

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

 is as long as the third, fourth and fifth together : the legs are stout 

 and very short ; the shanks are longer than the thighs. In 

 other characters it resembles the winged female. Found in 

 August. 



Length of the body 1 line. 



The winged male. Scarlet : like the winged female but smaller, 

 and having a rather narrow front : the eyes also are more promi- 

 nent than those of the female : the mouth has a black tip, and 

 reaches the base of the middle legs : the lobes of the chest, the 

 breast, and the sexual parts are brown. In one insect the second 

 fork of the third branch-vein in one wing is twice the length of 

 that in the other wing. 



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



Sixth Group. 



Containing only one species, and represented by four forms, 

 which are — the winged viviparous female, the wingless oviparous 

 female, the wingless male, and the winged male. 



8. Aphis Tilia, Linn. 



Aphis Tilia, Linn. Syst. Nat. ii. 734. 11 ; Faun. Suec. 984; 

 Fabr. Sp. Ins. ii. 388. 34 ; Ent. Syst. iv. 218. 39 ; Syst. Rhyn. 

 299. 39; Leeuwenh. Lettr. 1696, 293, 294; Frisch. Ins. xi. I. 

 3. t. 17; Geofi". Ins. iii. 1. 495. 6; DeGeer, Ins. iii. 77. 12. 

 t. 5. f. 1-6 ; Schrank, Faun. Boic. ii. 1. 117 ; Latr. Gen. iii. 173 ; 

 Burm. Handb. Ent. ii. 95. 5 ; Curtis, Brit. Ent. 577; St. Farg. 

 et Serv. Enc. Meth. x. 247 ; Fonscol. Ann. Soc. Ent. x. 182. 25 ; 

 Sir Oswald Mosley, Gardener's Chronicle, i. 684; Kalt. Mon.Pflan. 

 i. 129. 99 ; Batz. Forst. Ins. iii. 219. 



This pretty Aphis feeds on Tilia rubra, the common lime-tree ; 

 T. platyphijlla, the broad-leaved lime ; and on T. americana, the 

 American lime. 



The viviparous winged female. Is hatched from the g^^ in the 

 middle of April, or rather later in the year : it is then nearly 

 oval, rather flat, and of a bright lemon colour : the feelers are 

 about half the length of the body ; the tip of each of their joints 

 and the tip of the mouth are brown : the eyes are dark red : 

 the nectaries are extremely short. The wings are unfolded in 

 the beginning of June, and for a while after this operation the 

 body is pale yellow, and the wings are milk-white and spotless : 



