96 THE BUTTERFLIES OF THE WEST COAST 



42. Pieris Bryonae. 



Plate VI ; Figures 42, a, b, bb, c. 



Fig. 42, Male, Juneau, Alaska, July 10, 1891 ; Author. 



a. Male, underside, St. Michaels, E. W. Nelson, ex. 



W. H. Edwards. 



b. Female, Juneau, July 10, 1891 ; Author, 

 bb. Female, Juneau, July 10, 1891 ; Author. 



c. Female, underside, Chillkat, July 20, 1891 ; Author. 

 Bryonae lives in Alaska, coming south but little if any below 



Sitka. It is essentially a cold-weather butterfly, and loves to fly 

 about in the neighborhood of snow-banks and glaciers, feeding on 

 the blossoms of the few and small Arctic cruciferous plants that 

 grow there. I found them more abundant at Pyramid Lake than 

 at any other locality ; they are a low-land kind, and are not found 

 up on the mountains at all. 



The wings of Bryonae are almost always deeply yellowed, as 

 well as browned. The veins are always deeply marked or over- 

 laid with brownish-yellow, brown on the upper side, and yellow 

 on the under side. 



43. Pieris Hulda. 



Plate VI ; Figures 43, a, b, bb, c. 



Fig. 43, Male, Juneau, Alaska, July, 1891 ; Author. 



a, Male, underside, Chillkat, Alaska, July, 1891 ; 



Author. 



b, Female, Juneau, Alaska, July, 1891 ; Author. 



bb, Female, St. Michaels, Alaska, E. W. Ndson, ex. 

 W. H. Edwards. 



c, Female, underside, Juneau, Alaska, July, 1891 ; 



Author. 



Hulda is similar to the preceding, but a little smaller in size, and 

 more brownish than yellow ; Bryonae being the yellow form, and 

 Hulda the brown one ; and the veins of Hulda are not so heavily 

 overlaid with color, or in other words, not so distinctly marked. 



In Figure a, for instance, the veins are not defined at all, if they 

 were, it would be classed as a Bryonae, I suppose, because it is so 

 yellow. I suppose that these two forms are really but one species, 

 just as Occidentalis-Calyce, and Protodice-Vernalis are but one; 

 but the two names serve to identify the two differing forms, as is 

 proper, for that is what names are used for. 



