246 BULLETIN 15 7, U. S. NATIONAL MUSEUM 



In its flight it greatly resembles Argynnis cyhele or A. aphrodite^ 

 but it is not so active and the flight is lower, usually 2 or 3 

 feet above the ground. In its flight as in the shape of its wings 

 it is intermediate between our local f ritillaries and the heliconians of 

 the American tropics. 



ARGYNNIS ATLANTIS (Edwards) 



Plate 14, Figures 2, 3 



This northern species, which ranges south into West Virginia, is 

 especially characteristic of cold bogs surrounded by woods and the 

 marshy banks of mountain streams flowing through woods. In con- 

 trast to the related species recorded from the District, this form 

 frequently occurs in small isolated colonies, the presence of which 

 may be wholly unsuspected. It may be at once distinguished from 

 A. cyhele and A. aphrodite by its different flight, which resembles 

 that of A. nevadensis. 



In color it closely resembles A. aphrodite but is easily distinguished 

 by the dark margins on the wings above and by the difference in the 

 shape of the silver spots on the hind Avings below. 



BRENTHIS BELLONA (Fabricins) 



Beijx>na 



Plate 4, Figures 6 to 8 



This butterfly has almost the same range as B. mynna^ and is com- 

 monly found with it. It is therefore likely to occur somewhere in 

 the vicinity of Washington. It is abundant in Pennsylvania and 

 western Maryland and southward in the mountains of western and 

 southwestern Virginia and West Virginia, occurring also in north- 

 western North Carolina and in Tennessee. On the coast it occurs 

 southward to southern New Jersey. 



In its habits it closely resembles B. myrina^ but it is rather less 

 active. 



Though Brenthis hellona and B. inyrina often, perhaps even usu- 

 ally, occur together, they prefer a slightly different type of habitat. 

 Brenthis myrina is especially characteristic of open grassy bogs 

 surrounded by rough scrubby pasture land, while B. hellona is char- 

 acteristic of boggy and grassy banks of small streams in wooded 

 valleys in hilly or mountainous country. 



The locality at Beltsville, Md., where B. myrina is found, is quite 

 a typical locality for it, and at the same time a locality where one 

 would scarcely expect to find B. hellona. 



In the Greenbrier Valley in West Virginia I have found B. hellona 

 common in wet grassy areas where the mountain streams flowed 



