108 ANNALS NEW YORK ACADEMY OF SCIENCES 



Hind wings white. 



Primaries with s.t. hne angled inward in discal fold . . staudingeri 



Primaries with s.t. line not so angled. 



Primaries with prominent series of dentate black marks 



before s.t. line richardsoni 



Primaries without such marks before s. t. line . . quadrilunata 



Hind wings yellowish leucocycla 



Hind wings uniformly suffused with fuscous. 



Primaries with the stigmata not filled with blue-gray . etacta 



Primaries with the stigmata filled with blue-gray . . membrosa 



Staudingeri has not appeared heretofore in our Catalogue; but I found, 

 on comparing the figure and descriptions carefully, that I had two males, one 

 from Labrador and one from "British Columbia," which were apparently 

 the same, and which agreed with the characters given for the species. 



Of quadrilunata I have a pair from Colorado, which are properly de- 

 termined. An example from Laggan may indicate a new form. 



Of richardsonii I supposed I had a long series; but I found, to my sur- 

 prise, that only one nice pair from Labrador answered all the requirements 

 of Hampson's definition. My Greenland examples received through 

 Staudinger did not answer at all. The White IMountain examples, which 

 stand under richardsoni in our collections, had the s.t. line of staudingeri; 

 and the long suite of specimens from Newfoundland represented yet another 

 form. They are distinctly yellow-winged, but will not do for leucocycla 

 at all. The species marked schoenherri in my collection, and to which name 

 leucocycla has been cited heretofore as a synonym, vras neither one nor the 

 other. 



Using the same characters used by Hampson, in a somewhat different 

 form, I differentiate the species now before me as follows : — 



S.t. line of primaries angulate and dentate. 

 Secondaries white or nearly so. 



Ordinary spots of primaries white-marked, median 



line white-shaded staudingeri 



No white on primaries, all the pale markings bluish 



gray hampa 



Secondaries decidedly yellow. 



Ground-color blue-gray, terminal space contrastingly 



blue-gray flanda 



S.t. line of primaries even, or scarcely irregular. 



Secondaries Avhite, primaries contrastingly black and 

 white marked. 



