NORTH AMERICAN BUTTERFUES. 



35 



outer margin, orange. The central spot of fore wings is more promi- 

 nent, and that on hind is green centered. 



G3. COLIAS HECLA Lef. 

 Arctic Bordered Butterfly. 



Orange, -with a black border to both wings, There is a small, black 

 central spot on both wings, and an indistinct one with a pale center on 

 hind. Beneath, greenish, darkest on base of wings. Female, differs in 

 being more yellow, with wider bordering, and inclosing a few^ yellow spots. 

 The central spot on fore wings is larger and the whole surface of hind 

 wings beneath, is overwashed with dusky, but there is a sub-marginal 

 row of almost confluent yellow spots. Expands 2.G0 to 1.7o. Habitat, 

 Arctic Regions, from Greenland to Behring Straits. 



G4a. CoLiAS UECLA HELA Str., darker than the tpye and the green- 

 ish yellow spots on lower border of hind wings beneath, are absent. 

 Habitat. Hudson's Bay. 



Illustrating the genus Colias, fore wing, upper side, a, boothii:!), hartfordii; d, occidenta- 

 lis, male, o. same female: f, chipppwa; g Christina: h, alexandria: i, eurythemerj, central spots left 

 hind wing female, same species; c, same of occidentalis. 



04. COLIAS BOOTHH Curt. 

 Curtis' Bordered Butterfly. 

 AVings, rounded at apex. Fig. \i\, a. Male, greenish yellow with a 

 patch of orange on inner two-thirds of all but upper border of fore wings. 

 There is a distinct central spot on f jre wings, and a marginal band of 

 black spots. Hind wings, with a marginal row of five spots not reach- 

 ing lower margin. Central spot, orange and double. Beneath, similar. 

 Female, differs in having a broad bordering band on both wings, enclos- 

 ing a mw of l)alloon-shaped spots. Expands 1.80 to 2.10 Occurs in 

 Julv and August. Habitat. Arctic America. 



