104 
CLOUDED YELLOW BUTTERFLY. 
of each. The hinder wings are likewise margined 
wdth black, the ground colour slightly mixed with 
green, and there is on each a round discoidal spot of 
deep yellow. On the under side, the upper wings 
are pale tawny on the disk, and greenish at the ex- 
tremity, with a central black spot, and an obsolete 
series of blackish spots parallel with the outer edge : 
the under wings greenish, with a central silvery ocel- 
lus, having another small one adjoining, and a curved 
row of faint rust-coloured dots posteriorly. The body 
is yellowish-green, dusky on the back : the antenna) 
reddish. The female is distinguished chiefly by hav- 
ing a few yellow spots on the black marginal band 
of the upper wings. Examples of this sex sometimes 
occur, in which the parts, usually yellow, arc greenish- 
white, a circumstance which has led some authors to 
describe it as distinct, under the name of C. helice. 
Varieties of both sexes have been found in Britain, 
of a considerably smaller size and paler colour than 
ordinary specimens, and presenting at the same time 
so many other minute points of difference, that they 
have been figured and described as examples of the 
species named chrysotheme by continental naturalists.* 
The caterpillar is deep green, with a white line 
along each side of the belly, marked with yellow 
spots and minute bluish dots. On the Continent it 
is found chiefly on the Cytisus austriacus, but as, 
* See Stephen's Illus. of Entom. Haustellata, vol. i. p. 11, 
PI. II.*, figs. 1, 2. 
