48 THE BUTTERFLIES OF THE BRITISH ISLES. 



west, there seems to be only one flight, and this is in June. It 

 may be well to remember that this butterfly does not like the 

 pill-box, and will not settle down quietly therein. 



Possibly the Wood White had a much more general distribu- 

 tion in England at one time than it now seems to have. It was 

 not uncommon in parts of Sussex some years ago, but there 

 appears to be no record of its occurrence there now. It is cer- 

 tainly much scarcer in the New Forest than it used to be. 

 However, it is still to be found, no doubt, in many parts of 

 England and Wales, but chiefly perhaps in the counties of 

 Berkshire, Devonshire, Cornwall, Worcestershire, Hereford- 

 shire, Lancashire, and Cumberland. Also in the south and 

 west of Ireland. It occurs throughout Europe, Western and 

 Central Asia, and its range extends eastwards through Siberia, 

 Amurland, China, and Corea to Japan. 



The Pale Clouded Yellow (Co lias hyak). 



This usually scarce butterfly (Plate 21) is of a primrose- 

 yellow colour in the male, and, as a rule, almost white in the 

 female ; sometimes the latter sex is of the yellow male colour. 

 The outer margin of the fore wings is broadly black in both 

 sexes, but there are some more or less united spots of the 

 ground colour in the black towards the tips of the wings, and 

 below vein 3 the black is usually confined to the outer margin. 

 There is a black spot near the middle of the wing, and some 

 blackish dusting quite near the base of the wing. The hind 

 wings have a pale orange central spot, sometimes two spots, 

 and the blackish border on the outer margin is generally narrow, 

 and often interrupted or broken up into spots. The fringes 

 of all the wings are pinkish, as also are the antennae. The egg 

 is pearly yellowish-white when first laid ; a few days later the 

 top becomes transparent, white, and glassy, shading down- 

 wards, into yellow, and then clear rosy orange ; the base is 



