150 NATURAL HISTORY OF ARCTIC AMERICA. 



It is iL'uiaikable that the collection of butterflies made by tlie British 

 Exi)e(lition, between latitude 78^ and 82°, avcII toward the Arctic Sea, 

 .should exhibit a gi-eater number of species, namely, 5, than is known in 

 ^outhcru Greenland, where we are told but 4 species have hitherto been 

 taken, aiul this northern series does not embrace the semis Chionoba^, 

 one or two species of which are found in Greenland. Desides C. Hccla 

 and Argijnnin J'olnri.s, taken by Mr. Kumlien, vmra Argynnin Charidea, 

 Lycana AquUo, and, most suri)rising of all, ChryHophanua PJthvas, a 

 species represented throughout the northern United States nndcr a 

 slightly different form, Americana. 



I^'aniily, NYMPUALIDA'L 

 Sub-family, Xympiiali>vi:. 

 Genus, Argyiinis, Fabricius. 



1. A. Freya, Tlumbcig. 



Two males were taken in Southwest Greenland. This species is dis- 

 tributed over the boreal regions of both continents ; in America, from 

 Greenland to Alaska ; and it follows the Eocky Mountains as far to the 

 south as Colorado. It is subject to very little variation. 



2. A. Polaris, Boisdiival. 



One male was taken at Quickstep Harbor. This species is more re- 

 stricted in distribution than Freya, and, so far as known, is limited to 

 Xortheast America, from Labrador to the Arctic Sea. It was taken by 

 the British Expedition as far to the north as latitude 81° 52', and by 

 tlie American ICxjx'dition (Polaris) at Sio 50'. It varies much in color, 

 and tlir cxiniiph' sent iiic h\ Mv. Kiinilicn is remarkably melanic on the 

 ii]i|icr sinlacc, tlic liiud wings especially showing scarcely any fulvous. 



Snb-taniily, Satvuinm:. 



Genus, Chioiiohd.s. Boisduxal. 

 1. C. Semidea, S.iy. 

 Oi iiii, IJiiisdin III. 



Two males were taken at (^>niekste]> Harbor. ( )ne of ihese has the 

 upper surlace dark blackish Itrown, and the diseal belt on hind wings 

 beneath distinctly outlined on both edges. The other is light or pale 

 blaek-brown, and the belt is almost lost in the dense markings which 

 i'over the wing. But si)ecimens IVoni tlie \N hite .Mountains of Xew 

 Hampshire show similar variation. This species iidiabits Labrador, 

 and the Bockv Mountains at verv liigli altitudes as far south as Colo- 



