26 BUTTERFLIES 



PLATE XIII 

 THE PALE CLOUDED YELLOW (2) 



Sometimes this butterfly is known as the 

 Clouded Sulphur. It appears in the same places, 

 and at the same time of the year, as the " clouded 

 yellow," but is hardly ever quite as common. 

 Generally, indeed, you may see ten or twelve 

 "clouded yellows" to one Pale Clouded Yellow. 

 You can easily tell it by its much paler colour, 

 for its wings are quite light yellow instead of 

 rich orange, while sometimes one meets with 

 a Pale Clouded Yellow which is really almost 

 white. And, besides that, the black border of the 

 upper wings, instead of being nearly the same 

 width all the way along, is very broad at the top 

 and very narrow at the bottom, while even in 

 the male it is marked with several yellow spots. 



This pretty butterfly is quite a seaside insect, 

 and sometimes it may be seen fluttering over 

 the waves a long way out from the shore. Indeed, 

 there seems to be very little doubt that now and 

 then it flies right across the Straits of Dover, 

 and reaches this country from France ! 



The caterpillar of the Pale Clouded Yellow is 

 olive-green in colour, sprinkled with black dots, 

 and with two yellow lines along its back and 

 another on each side. It feeds on clovers and 

 trefoils. 



