103 



CLOUDED YELLOW BUTTERFLY. 



Cclias Edusa. 



PLATE V. Fig. 2. 



Colias edusa, Fab — Donovan, vii. PL 238, Fig. 2, female, 

 and ii. PL 43 ( C. hyale), male — Pap. Electra, Lcicin, PL 

 32. — Clouded yellow or Saffron 3., Harris'' Aur. C. He- 

 lice, Haivorth, Jermyn, var. 



In the form of the antennae, oral organs, and most 

 other parts from which generic characters are usually 

 drawn, Colias presents no very important difference 

 from the preceding" genus. The wings, however, 

 are of a different shape, the primary pair being tri- 

 angular, and the secondary ones rounded. The spe- 

 cies are not very numerous, and none of them, even 

 of the exotic kinds, are beyond the middle size. 

 They are remarkable for the uniformity of their tints, 

 the ground colour being some shade of yellow, often 

 tinged with green, and a portion of the wings more 

 or less marked with black. This general resemblance 

 has led to some confusion in their synonymy. The 

 male of C. edusa .is fulvous above, or pale orange- 

 yellow ; the upper wings with a wide black border 

 at the extremity, which is waved on its inner edge, 

 and a rounded spot of the same colour in the middle 



