92 BRITISH BUTTERFLIES AND MOTHS 



in the midland counties. In exceptional seasons, it has 

 occurred in Yorkshire and Westmoreland. 



By the deep, rich, yellow colour of the wings it may 

 be at once recognized, no other of our native butterflies 

 coming at all near it in that respect. 



The expansion of the wings is from 2 to 2j inches. 

 Both sexes have the fore-wings of a deep rich yellow, 

 with a central black spot, and a broad black band along 

 the hind margin ; this black band is simply veined with 

 yellow in the male (represented on the Plate), but in 

 the female it contains several yellow spots. The hind- 

 wings are much clouded with grey, with a large central 

 orange-yellow spot. 



The larva is of a dark green with a white stripe 

 spotted with yellow on each side. It feeds in June 

 and July on clover and lucerne, and reposes on the upper 

 surface of the leaf along the midrib. 



The perfect insect makes its appearance towards the 

 end of August and flies swiftly in meadows and lanes, 

 and may frequently be observed on railway banks. It 

 continues to come out throughout September, and in 

 fine seasons it may be met with during the first half of 

 October. In some seasons it is very scarce, but in 

 others it occurs in unusual plenty. 



There is a pale variety of the female, which was at 

 first described as a distinct species. In it the ground- 

 colour of the wings, instead of being the deep, rich 

 yellow, is of a dull greenish-yellow. 



The Pale Clouded Yellow (C 'alias Hyale) is an allied 

 species, less frequent in occurrence and less brilliant in 

 appearance. It was extremely plentiful in the year 1842. 

 The larva of C. Hyale has been noticed by Mr.Tugwell in 

 the 'Entomologist'sWeekly Intelligencer' (vol. iii., p. 11). 



