THE GOSSAMER-WINGED BUTTERFLIES 



A. Hind wings without tails. 



B. Eyes hairy. 



C. Lower surface of the wings slate brown. (JV. lygda- 

 mus), p. 245. The Silvery Blue. 



CC. Lower surface of the wings pale ash-gray. (C. 

 ladori), p. 249. The Spring Azure. 



BB. Eyes naked. (R. scudderi), p. 246. 



Scudder's Blue. 

 AA. Hind wings with a slender taillike prolongation. (-£. 

 comyntas), p. 254. The Tailed Blue. 



The Silvery Blue 



Nomiades lygdamus (No-mi'a-des lyg'da-mus) 



Plate XXXVII, Fig. i, 2, 3 



Wings above pale, glistening, frosty blue, narrowly bor- 

 dered in the male and widely in the female with blackish 

 brown. Wings beneath uniform, slate brown, with or with- 

 out a black spot in cell R + M of each wing, with a black 

 line or bar bordered with white on the medial cross-veins, and 

 with a row of conspicuous black spots edged with white cross- 

 ing the middle of the outer half of the wing. On the hind 

 wings there is an additional spot near the extremity of the 

 basal third of cell R r Expanse of wings one to one and a half 

 inches. 



The adults occur in the spring in Ohio, Michigan, and 

 Wisconsin, and in the Atlantic States from the upper waters 

 of the Susquehanna to Georgia. 



Caterpillar. — Early stages unknown. 

 17 245 



