Mr. F. Walker’s Descriptions of Aphides. 47 
81; Harris, Ins. New Engl. 190; Curtis, Journ. R. Agric. Soe. 
Wy ote. 1. 0, 6. 
A, Raphani, Schrank, Faun. Boie. ti. 1. 119. 1229. 
A. Isatidis, Fonscol. Ann. Soc. Ent. x. 
A. Floris-Rape, Curtis, Journ. R. Agric. Soe. iii. 55. t. C. 
£27, 9% 
Cinara Raphani, Sir Oswald Mosley, Gard. Chron. i. 827. 
C. Brassica, Sir Oswald Mosley, G. C. 1. 827. 
Crambaphis, Amyot, Ann. Soc. Ent. 2™ série, v. 478. 
This Aphis abounds on the cabbage, Brassica oleracea, from 
the beginning of June to the beginning of November, and is 
found both in Europe and in North America. The matriarchs 
of the species dwell on wild plants, and their winged offspring 
fly to the cabbage, repose there on the underside of the leaf, and 
are soon surrounded by groups of wingless little ones. 
The viviparous wingless female. This when very young is linear, 
pale green, and slightly powdered with white; the limbs are white: 
in the middle of June when full-grown it is pale yellowish green, 
shghtly oval, very plump and convex, and most thickly covered 
with white powder : the front is convex: the feelers are pale yel- 
low with brown tips and much shorter than the body; the first 
and the second joints are not angular; the fourth is less than 
half the length of the third; the fifth is a little shorter than the 
fourth ; the sixth is much shorter than the fifth ; the seventh is 
longer than the fourth: the eyes are black: the mouth is pale 
yellow with a brown tip: the nectaries are yellow, and hardly 
more than one-twentieth of the length of the body : the legs are 
pale yellow ; the knees, the feet, and the tips of the shanks are 
black. It is extremely numerous and most abundantly powdered 
in the beginning of July: the limbs are almost black, and the 
nectaries are about one-twelfth of the length of the body: its 
colour when it sheds its skin is soft fresh velvet-like green, but 
it soon again assumes the dull dusty hue which harmonizes so 
well with the underside of the cabbage-leaf. The part which it 
infests becomes discoloured ; it often emits a colourless honey- 
dew, is the prey of Aphidius (Trionyx) Rape, Curtis, and of an 
Allotria, and is much infested by Leptus Aphidum. 
Ist var. The body is dull olive-green, oval, short, and plump : 
the feelers are white with black tips, and nearly half the length 
of the body : the mouth is white ; its tip and the eyes are black : 
the nectaries are black, and as long as one-twelfth of the body : 
the legs are white and moderately long; the feet and the tips of 
the shanks are black. In summer on Spinacia oleracea. 
2nd var. The body is green, yellow towards the head, and 
covered with a whitish bloom: the feelers are yellow with black 
tips, and more than half the length of the body: the legs are 
yellow ; the feet are black ; the hind-shanks are green. 
