2i6 Lloyd's natural history. 



Colias sarepte?isis, var. Kirbyi^ Lewis, Discussion on the Law of 

 Priority, p. 34 (1872). 



The Pale Clouded Yellow is a Butterfly of rather smaller ave- 

 rage size than the last species. The wings are of a sufficiently 

 bright yellow on the upper side, but with no tendency towards 

 orange, and the females are often whitish. There is a broad 

 black border on the fore-wings, irregularly spotted with yellow, 

 which is incomplete at the hinder angle ; on the hind-v>'ings it 

 is narrow, often incomplete, and there is frequently a second 

 narrow macular line within it. The fore-wings are marked with 

 a black discoidal spot, and the hind-wings with a large orange 

 one. The under side is of a deeper yellow than the upper, espe- 

 cially on the hind-wings ; there is a sub-marginal row of rusty- 

 brown spots, a black discoidal spot on the fore-wings, and two 

 contiguous silvery spots surrounded with ferruginous on the 

 hind-wings. The antennae and fringes are reddish. 



The larva (vol. i. pi. 3, fig. 2) is velvety-green, with tw^o yellow 

 lateral lines, and black dots on each segment. It feeds on 

 clover, trefoil, &c. The pupa is also green, with a yellow line 

 on the sides. The Butterfly is double-brooded in many places, 

 but is rarely seen in England till the autumn. 



The Pale Clouded Yellow is found throughout a large part 

 of the Paloearctic Region, but not beyond it, unless its reported, 

 but doubtful, occurrence in South Africa should be confirmed. 

 It is a rather scarce insect with us, and is found chiefly in clover 

 and lucerne fields in the south of England, and is uncertain in 

 appearance, though commoner than formerly. In many parts 

 of Germany it is a much commoner insect than E. hyak, and 

 much more regular in appearance ; and in ordinary years it is 

 one of the commonest autumn Butterflies, not much less com- 

 mon, sometimes, than the White Cabbage Butterflies. JNIy own 

 experience is that its flight is much less rapid than that of E. 

 hjaie, though in England it is said to fly with equal or greater 



