COLIAS EDUSA. 67 



has spots in the brown border, which is less clearly 

 denned, and very narrow on the hind-wings and at the 

 anal angle of the fore-wings, besides not being con- 

 tinued along the inner margin of the fore-wings as it is 

 in edusa. 



The chief home of hyale in England is in the south- 

 eastern maritime counties, especially where chalk prevails ; 

 but it is also found occasionally in many other counties. 

 There is a variety of the female in which the ground- 

 colour is white, or nearly so, corresponding to the pale 

 variety of the female of edusa. 



C. edusa, Fabr. (Clouded Yellow, or Clouded Saffron) 

 (Figs. 54 to 58), one of the most brilliant of our larger 

 butterflies, is usually rather more than 2 in. across the 

 wings ; these have a somewhat powerful appearance, and 

 well the insect knows how to make use of them, for its 

 flight is very rapid, giving the pursuer little chance 

 of running it down. Indeed, as in the case of so 

 many other butterflies, the would-be possessor does best 

 to watch the creature to a flower, and to take it there. 

 If, in the excitement of the moment a bungling stroke 

 perchance is made, it will be no use paying attention 

 to the edusa that has gone, but be on the lookout for 

 the next one to appear. 



Until 1892, this somewhat erratic butterfly had not 

 occurred in profusion since 1877, in which year it 

 was reported from the Orkneys to the extreme southern 

 point of England ; but, after an interval of fifteen 

 years, entomologists were again gladdened by a great 

 " edusa-year," and they are doubtless hoping that in 

 some form or other enough have escaped the winter's 

 hardships and the hunter's net to again delight us with 

 their presence. 



The larva (Fig. 58) is cylindrical, like the rest of 



F 2 



