EASTERN UNITED STATES. 71 



116. 

 Under side of hind wings with a border of metallic spots, 



Lycaena Scudderii, (122) 

 Under side without metallic spots, 117 



117. 



Under side dark gray, Lycaena Lygdamus, (121) 



Under side pale bluish gray, Lycaena Pseudargiolus, (123) 



118. 

 Upper surface black, 



Lycaena Pseudargiolus, var. Violacea, (123) 

 Upper side brown, under side brown, with numerous white 



bands, 119 



119. 

 Six subterminal round black spots on under side of hind wings, 



Lycaena Isophthalma, (126) 

 Seven subterminal round black spots on under side of hind 



wings, Lycaena Exilis, (127) 



120. 



Knob of antennae thick, ovoid, or elongate ovoid, 121 



Knob of antenna) spindle-shaped, 185 



121. 



Knob of antennae without a hook or bent projection at the end, 122 

 Knob of antennae ending in a hook or bent projection, 126 



122. 



Knob blunt, conical, without a spine, 123 



Knob elongate or ovoid, rounded at the tip, straight or a little 



semilunar; somewhat compressed, Pyrgus, 125 



Knob rounded ; the last joint ending in a short, slender spine ; 

 fore wings brown washed with yellow ; hind wings yel- 

 low, with brown border, Ancyloxypha Numitor, (132) 



123. 



Third joint of palpi concealed by hair of second ; abdomen 

 much longer than hind wings; brown, with fulvous yel- 

 low spots, Carterocephala, 124 

 Third joint of palpi free ; abdomen but little if any longer than 

 hind wings ; brown ; costal edge yellow, 



Thymelicus Poweshiek, (133) 



