69 



no adequate reason, after summing up the evidence on both sides, for 

 not accepting Ehves and Edwards' reference and this course has seem- 

 ingly been followed by Seitz's Macrolepidoptera of the World in both 

 the Palaearctic and Nearctic volumes. On the face of it oeno Bdv. 

 (1832-33) would seem to have the priority; Scudder (Hist. Sketch, 

 140) gives the date of publication for the genus Chionobas (proposed 

 in the Icones) as probably late in 1832; subhyalina Curt, was published 

 in 1835 and the other names much later. Whether typical oeno and 

 crambis (Northern European forms) occur in this country we do not 

 know ; the common form in Labrador is that figured by Edwards as 

 crambis (Butt. Ill, Chionobas VI) ; for the present until good series 

 of Arctic material are available we would list the species as follows : 



oeno Bdv. 



crambis Frey. 



a subhyalina Curt. 



b assimilis Butl. 



Katalidin Newc. from Maine is very closely related to the Lab- 

 rador oeno in genitalia and will probably prove to be a race of this 

 species; peartiae Edw. (if our identification of a single specimen from 

 the Arctic Coast Plains in Coll. Barnes be correct) is also very close 

 in the shape of the claspers but the underside of the primaries is much 

 darker than in oeno and it may be kept separate until more material is 

 available. 



Brucei Edw. also belongs in this group but the apical portion of 

 the clasper is more slender than in either katalidin or oeno. 



Semidea Say and beani Ehves belong to a group distinct from 

 the oeno group and with them must be associated the Colorado form 

 figured by Edwards erroneously as oeno (Butt. Ill Chionobas, PI. 

 VII, Figs. 1-4) which Elwes shows (1. c. PI. XV, Fig. 9) to have a form 

 of clasper closely related to that of semidea but with fewer and larger 

 teeth on the apical dorsal portion; as this character is quite constant 

 in a long series before us we see no reason for not regarding it as of 

 specific value especially as the form is easily separated from semidea 

 by the general yellower appearance of the underside. As there is 

 apparently no name available we describe the species as follows : 



Oeneis lucilla sp. nov. (PL XI, Figs. 16-18). 



Palpi black, fringed with white on dorsal side ; antenna! knob ruddy brown ; 

 upper side of wings dull immaculate brown in $ with faint traces of a broad 



