BUTTERFLIES OF THE DISTRICT OF COLUMBIA 249 



conditions for this little butterfly, which is known from as far south 

 as Georgia. 



In general it resembles .S'. calanus, but the white lines bordering the 

 dark bands below^ are as broad on the inner as on the outer side, 

 and both interiorly and exteriorly are very irregular, not being 

 continuous or simply crenulate as in S. caJanu,H. 



STRYMON EDWARDSII (Scudder) 



Plate 57, Figures 5, 6 



This species should occur in the District. It is to be sought for 

 among scrub oaks, particularly in sandy areas where ant hills are 

 numerous. It occurs southward to southwestern North Carolina. 



It resembles S. calanus, but the inner white border of the dark 

 bands on the undersurface of the Avings is broader, and the dark 

 bands tend to be broken up into dark spots encircled w^ith white. 



STRYMON ACADICA (Edwards) 



Plate 57, Figures 7, 8 



It is possible that this fine insect will be found in the District. 

 It is to be looked for about willows along the sides of ponds and 

 streams. 



It is easily distinguished from all the other species occurring, or 

 likely to occur, in the District. The undersurface of the wings is 

 pearl gray marked with isolated small circular black spots ringed 

 with white. The hind wings have two slender tails. 



STRYMON CECROPS (Hubner) 



Plate 23, Figures 3, 4 



This species is quite likely to occur here as a casual visitor. 



It is easily distinguished from all the otlier species mentioned 

 herein by having on the undersurface of both wings a broad briglit 

 led line outwardly bordered with white. The color above is dark 

 brown becoming obscurely violet-blue on the basal portion of the 

 wings and on the inner margin of the hind wings. 



STRYMON FAVONIUS (Abbot and Smith) 



Plate 57, Figures 3, 4 



This species, which is abundant in the South, occurs as far north 

 as West Virginia and the coast of New Jersey. It is to be looked 

 for in the District late in summer. In its habits, as I have observed 

 it in Florida, it much resembles S. calanus. 



