6 i Canadian Arctic Expedition, 1913-18 



Genus Eurymus Swains. 

 Eurymus meadi Edw. 



Colias meadi Edw.: Trans. Amer. Ent, Soc, III, 267, 1871. 



One specimen from Bernard harbour, Dolphin and Union strait, Northwest 

 Territories, July 14, 1916, male (F. Johansen). 



This was the only specimen of this butterfly which was in the Arctic col- 

 lection. It resembles very closely specimens from Colorado in the Canadian 

 National collection. The glandular spot is well developed, and is distinctly 

 tinged with red. 



The occurrence of this species at Bernard harbour is a most interesting 

 record. It was captured with specimens of hecla glacialis, from which, of 

 course, it was at once separated by the spot referred to. 



Eurymus hecla glacialis McLach. 

 Colias hecla var. glacialis McLach.: Jour. Linn. Soc, XIV, 108, 1878. 



Twenty -four specimens from the following localities: Collinson point, 

 northern coast of Alaska, July 10, 1914, 4 males, 2 females (F. Johansen). 

 Barter island, northern Alaska, July 4, 1914, July 17, 1914; July 19, 1914; 

 July 21, 1914; 8 males, 3 females (D. Jenness); Herschel island, Yukon Terri- 

 tory, end of July, 1916, 1 female (F. Johansen); Bernard harbour, Northwest 

 Territories, July 14, 1916; August 1, 1915, August 4, 1915; August 17, 1915, 

 August 25, 1915; 3 males, 3 females (F. Johansen). 



One of the specimens from Collinson point represents the form pallida of 

 Skinner and Mengel. The specimens collected on Barter island were captured 

 while resting on the tundra. Mr. Jenness in a note which accompanied the speci- 

 mens states: " This butterfly flies with considerable speed in a comparatively 

 straight line for some distance." On Barter island the specimens were all 

 with one exception taken during sunshine, the temperature records noted by 

 Mr. Jenness varying from 44° to 56°F. The exception, a male specimen, was 

 taken on a cloudy day, the temperature at the time being 38°F. 



In the males the colour of the upper side of the wings is nearest to orange 

 excepting along the costa and along the inner angle of the secondaries where 

 the scales are greenish-yellow and black intermixed. The black marginal band 

 is wide and in most examples is conspicuously crossed on all wings with yellowish- 

 green veins. The discal spot on the primaries is black, conspicuous, and varies 

 in shape from an almost straight short dash to an enlarged almost rounded spot. 

 The centre of the latter spot is in some specimens filled in with white, in others 

 with red. The underside of the males is fairly constant, the secondaries being 

 greenish-yellow dusted with black. The black dusting is not so heavy along 

 the margins and the marginal area therefore is paler in colour and shows up 

 as a faint marginal band. The discal spot is white, heavily bordered, par- 

 ticularly outwardly with red and frequently prolonged to a point. In some 

 specimens a very small additional spot is present. The primaries beneath are 

 of a similar colour excepting the discal area which is flushed with pale orange. 

 In some examples there is a submarginal row of black spots, in others a single 

 black submarginal spot near the inner angle. The discal spot on the underside 

 of the primaries is conspicuous, and is centred with white or pale orange. The 

 males in expanse of wings vary from 38 to 45 mm. 



The females are similar in appearance and resemble very much the figures 

 labelled hecla on plate 27 g, vol. v of Seitz's Macrolepidoptera of the World, 

 excepting that the marginal band on all wings is decidedly wider. One female 

 from Bernard harbour has the wide band on the primaries with only traces in 

 two instances of the yellowish-green submarginal spots. The secondaries in 



