THE TRIBE OF THE YELLOWS 109 



As is the case with so many of the related yellow butter- 

 flies there is an albino variety of this species. It has been 

 given the variety name alba although it is really a pale 

 yellow rather than a true albino form. 



The Dainty Sulphur 



Nathalis iole 



While the Little Sulphur butterfly seems about as 

 delicate a creature as one could ask to see, it loses that dis- 

 tinction when it is compared with the still smaller Dainty 

 Sulphur. The latter expands scarcely an inch when its 

 wings are stretched apart, and its slender body and an- 

 tennae help to give the suggestion of extreme delicacy. 

 There is more marking of black upon the sulphur-yellow 

 wings than is the case with the larger form, the upper por- 

 tion of the front wings showing only a broad yellow band 

 upon a background of darker color. The under wings are 

 nearly all yellow. 



Synopsis of the Yellows 



Brimstone or Cloudless Sulphur [Callidryas euhule or 

 Catopsilia euhule) . Expanse 2| inches. Upper surface of 

 male clear, light, sulphur yellow. Female with a brown 

 spot in front of middle of each front wing and a narrow 

 brown margin on all the wings. Under siu-face deeper 

 yellow with sparsely scattered brownish dots. 



Red-barred Sulphur {Callidryas philea or Catopsilia 

 philea) . Expanse 3 inches. Easily known by the reddish 

 orange bars on the sulphur-yellow wings. 



Large Orange Sulphur {Callidryas agarithe or Catopsilia 



