“Mr. F, Walker’s Descriptions of Aphides. 49 
each side at the base of the feelers, but having no tubercles : there 
- is a very little bristle on each side of the front : the feelers are 
shorter than the body ; the fourth joint is hardly shorter than the 
third; the fifth is much shorter than the fourth ; the sixth is 
less than half the length of the fifth ; the seventh is full thrice 
the length of the sixth: the back is adorned with six or eight 
irregular lines of black dots: the tip of the abdomen is com- 
pressed, but very short : the fore-legs are not much shorter than 
the hind-legs ; the shanks are very slightly curved. 
60. Aphis Lactuce. 
Aphis Lactuce, Linn. Syst. Nat. ii. 335. 14; Fabr. Ent. Syst. 
iv. 220. 52 ; Syst. Rhyn. 301. 52 ; Réaum. Ins. ui. t. 22. f. 3-5 ; 
Gmel. ed. Syst. Nat. 1. 2205; Rossi, Faun. Etruse. 264. 1401 ; 
a Schrank, Faun. Boic. ii. 1. 120; Fonscol. Ann. Soc. Ent. x. 170. 
10; Kalt. Mon. Pfian. i. 37. 25. 
A, Ribis nigri, Sir Oswald Mosley, Gard. Chron. 1. 684. 
This species feeds on the following plants: Sonchus olera- 
ceus, S. asper, S. arvensis, Lactuca oleracea, Crepis tectorum, 
- Picris echioides, Ribes nigrum, R. rubrum, R. grossularia, R. uva 
crispa. Like A. Berberidis it differs from the other species of 
Aphis in having spindle-shaped nectaries. 
_ The viviparous wingless female. This is hatched from the egg 
in March on R. nigrum, R. grossularia, and more rarely on R. 
rubrum. At this time and when very young it is light lively 
green, shining, half-transparent, rather long, slightly convex, 
and has three rows of minute tubercles along the back : the head 
is almost white : the feelers are white at the base, brown towards 
the tips, and rather more than half the length of the body: the 
eyes are dark red: the mouth and the nectaries are white with 
brown tips, and the latter are about one-seventh of the length of 
the body: the legs are almost white; the shanks are bristly ; 
their tips and the feet are pale brown. 
Ist var. Dull dark green with still darker limbs: the feelers 
are a little shorter than the body, and the nectaries are about 
one-eighth of its length. 
_ When full-grown it is deep grass-green, oval, and shining : 
the discs of the head, the chest, the breast and the abdomen are 
black, and there is a row of black spots along each side of the 
latter : the feelers are black, and as long as the body : the nec- 
taries are black, spindle-shaped, and nearly one-fifth of the 
length of the body: the legs are black, long, and rather stout. 
Ist var. Green, dark green beneath, shaded with black or 
sometimes all black above: the feelers are a little longer than 
the body: the mouth is green with a black tip: the nectaries 
Ann. & Mag. N. Hist. Ser. 2. Vol. iii. 4 
