THE PTERIDS 



BB. Front wings without a black bar along the inner margin. 



C. Ground color of wings yellow. (E. euterpe), p. 98. 



The Little Sulphur. 



CC. Ground color of wings orange. (£. nicippe), p. 97. 



The Sleepy Yellow. 



AA. Antennae gradually increasing in size toward the tip ; 

 the club ill-defined, slender, cylindrical, and terminating 

 abruptly. 



B. The outer margin of the upper surface of the front wings 

 distinctly bordered with a dark-brown or black band. 



C. Fore wings with a dog's-head figure. (Z. cmsonid), 

 p. 90. The Dog's-head. 



CC. Fore wings without a dog's-head figure. 



D. Colors normally yellow. (E. philodice), p. 92. 

 The Roadside Butterfly. 



DD. Colors normally orange. (E. eurytheme), p. 95. 



The Orange Sulphur. 



BB. The outer margin of the upper surface of the front 

 wings not bordered with a brown or black band ; some- 

 times, however, there is a series of dark spots on the 

 outer margin. 



C. Ground color of the upper surface of the wings 

 canary-yellow. 



D. Outer margin of hind wings with a broad orange 

 band . ( C. philea), p. 87. 



The Red-barred Sulphur. 



DD. Hind wings without broad orange band. {C.eu- 

 bule), p. 88. The Cloudless Sulphur. 



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