104 



CLOUDED YELLOW BUTTERFLY. 



of each. The hinder wings are likewise margined 

 with 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 antennae 

 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, are 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 Eutom. Haustellata, vol. i. p. U, 

 PI. II* figs. 1, 2. 



