8 i Canadian Arctic Expedition, 1913-18 



The pale orange-coloured scales on the primaries of the above specimens of 

 boothi are in general similar in shade to Elwes' figures, 1, 4 and 5, already referred to 

 and in Ridgway's Color Standards and Nomenclature (1912) come nearest to light 

 orange-yellow or deep chrome, whereas in all of the specimens which we have de- 

 termined as hecla glacialis, the colour of the wings is not yellow but in most ex- 

 amples is nearest to orange as figured by Ridgway in the work referred to. In these 

 latter specimens too (41 examined) there is an absence of the greenish-yellow scales 

 which in the specimens of boothi are present along the marginal band and also 

 for the most part over the entire secondaries. In the three specimens referred to 

 above, recorded erroneously as boothi the colour of the secondaries is similar to 

 the colour of the primaries, as is the case in the series of specimens of glacialis 

 examined. The discal spot on the secondaries in the latter butterfly is also much 

 larger and redder in colour than in the specimens of boothi. The colour of the 

 figures of boothi in Ross' Second Voyage referred to above is very close to bright 

 chalcedony yellow (Ridgway, 1912). Verity 1 figures a coloured male (type) of 

 boothi, plate XLIII, 37. Two of our specimens resemble this figure very closely. 



Examining the six specimens more closely the following differences are 

 apparent : — 



Three of the specimens from Bernard harbour, have the marginal band well 

 defined. The band on the primaries in these specimens varies in width at vein 

 3 from about 1 mm. to about 2 mm. On the secondaries there is the same varia- 

 tion in width. The marginal band on the latter wings in two of the examples 

 ends abruptly at about midway between veins 2 and 3. In the other of these 

 three specimens the band on the secondaries is only clearly defined to vein 4. 

 The other three males have, also, narrow marginal bands but these are not so 

 well defined and are preceded on the primaries by yellowish-green spot-like areas 

 which give them a female-like appearance. In none of the specimens are the 

 veins in the marginal band brightly coloured as in hecla glacialis, all are con- 

 colorous with the band itself, but there are, however, in the marginal band on 

 the primaries a series of transverse, short, greenish-yellow dashes midway 

 between the veins. One specimen in fairly good condition has only a slight 

 tinge of yellow in the discal area, all the wings in general being of a greenish- 

 yellow colour. The discal spot on the primaries varies in size; in two examples 

 it is rounded, in the others more like a short dash. 



The underside of the secondaries is of a dull yellowish-green, the submarginal 

 area being paler and showing up as a band. In the better preserved specimens 

 there is a distinct pale yellowish-green streak near the centre. The discal spot 

 on the hind wings is rounded, white in colour, bordered with rosy-red which 

 colour in two examples runs outwardly to a point. In the basal area near the 

 body there is also a conspicuous rosy-red dash similar to that which occurs on 

 hecla glacialis. The primaries underneath are in general similar, the yellowish 

 flush in the discal area varying in intensity. In one specimen nearly the whole 

 underside of the primaries is yellowish. In this latter specimen there is a 

 conspicuous row of black submarginal spots. The discal spot is conspicuous, 

 whitish in the centre and margined with black. 



The specimens vary in expanse of wings from 36 mm. to 43 mm. Two 

 examples, both from Bernard harbour are shown on Plate IV, figs. 1 and 2. 



In the Entomological Record for 1910 2 , I recorded a specimen of C. boothi 

 from Dawson, Yukon Territory, 1908 (A. Day). This record should undoubtedly 

 refer to hecla glacialis. 



1 Rhopalocera Palcearctica. 



2 Rep. Ent. Soc. Ont., 1910. 



