22 1 Canadian Arctic Expedition, 1913-18 



On the underside the ground colour of the primaries is of a uniform shade 

 similar to ochraceous-buff^ the black markings being dull and much reduced. 

 There is an almost total absence of the pale apical patch which is present in the 

 above closely related species. The median band on the secondaries is very faint 

 but the band just beyond the median band is conspicuous and_silvery. The two 

 central median triangle-shaped spots of. the median band as well as the rhomboid 

 spot are dull silvery as are also the basal spot, which is indistinct, and the mar- 

 ginal row of spots, some of which are reduced in size. Between the marginal row 

 of spots and the white silvery band and between the central silvery spots and 

 the rhomboid spot the colour is similar to the under surface of the primaries. 

 The basal area and the median area below the central silvery spots are dark, 

 almost blackish and heavily pubescent. The antennae are almost wholly blackisb, 

 there being only a few silvery scales laterad. The setae on the palpi are dark 

 brown. 



Alar expanse, 39 mm. 



Type, a male, in the Canadian National collection bearing the label " 141st 

 meridian, north of mount Natazhat, international boundary survey, elevation 

 8,600 feet, June 15, 1913 (E. W. Nesham). 



Paratypes, three males and two females from the same locahty and bearing 

 the same label. 



The underside of the secondaries of one of the male paratypes is mostly 

 yellowish-orange in the submarginal area, otherwise all the males are similar in 

 colour and markings. These latter, particularly on the upper surface of the 

 wings are more diffused in two of the specimens than in the type. The upper 

 Surface of one of the, females is in general darker than in the type and on the 

 underside of this example there are present a greater number of silvery scales 

 in the submarginal area. 



Two specimens taken during, the Canadian Arctic Expedition, namely at 

 Bernard harbour. Northwest Territories, July 14, 1916, male and female (F. 

 Johansen), although somewhat rubbed are apparently this new species. 



The males differ in expanse of wings from 35 to 39 mm. and the females 

 from 37 to 39 . 5 mm. 



The upper side of the male type is figjared on PI. V, fig. 6 and the underside 

 of the same specimen shown on PI. Ill, fig. 6. On this latter plate the upperside 

 of a female from Bernard harbour, is shown at fig. 12. 



I rather hesitate to add a new name to the chariclea-freija group but it 

 seems advisable under the circumstances as I cannot associate the mount 

 Natazhat specimens with any of the known forms. The dull silvered spots on 

 the underside of the secondaries and the general colour of the upper and lower 

 sides of primaries and secondaries should readily separate it from any of the 

 forms in the group referred to. 



Brenthis freija Thunb. 



Papilio frgija Thunh.: Diss. Ent. Suec, II, 34, 1791. 



No specimens brought back by members of the Canadian Arctic Expedition, 

 but in the National collection at Ottawa there are examples from the following 

 northern localities: Nansen creek. Placer Mining camp, Yukon Territory, 

 July 7, 1914, 2 males (D. D. Cairnes); on Whitehorse-Dawson wagon road, 

 Yukon Territory, June 2, 1914, 1 male (D. D. Cairnes); near Jo-Jo's -Road 

 House on Kluane road, Yukon Territory, June 9, 1914, 2 females (D. D. 

 Cairnes) ; Champagne Landing, 50 miles from Whitehorse by Kluane road, 

 Yukon Territory, June 8, 1914, 1 female (D. D. Cairnes) ; Dease lake, northern 

 British Columbia, June 5, 1887 (G. M. Dawson and J. McEvoy) ; Cassiar trail, 

 10 miles west of Dease -lake, British Columbia, June 4, 1887 (G. M. Dawson 



' Ridgway's Color Standards and Nomenclature, 1912. 



