98 THE BUTTERFLIES OF THE WEST COAST 



Venosa has a rather wide range on the sea-coast, from the 

 southern point of Alaska on the north, to Monterey on the south ; 

 but it does not extend far inland at any point, nor does it ascend 

 high up on any mountains ; yet I have taken occasional specimens 

 of it in Montana, on the eastern side of the continental divide, but 

 it is rare there. The northern examples are darker, usually, than 

 the southern. 



46. Pieris Pallida. 



Plate VI ; Figures 46, a, b, bb, c. 



Fig. 46, Male, Tenino, Wash., May i, 1890; Author. 



a. Male, underside, Tacoma, Wash., May 3, 1890; 



Author. 



b. Female, Tenino, Wash., August 9, 1891 ; Author, 

 bb, Female, Truckee, Cal., July, 1892; Author. 



c. Female, underside, Tenino, Wash., August 9, 1891 ; 



Author. 



Rillida is distinguished by the dark line along the inner edge of 

 the fore wing ; this is but slight in the male, but is prominent in 

 the female, and near the outer angle of the fore wing this dark 

 mark turns upward into a dusky patch, above which is another 

 patch or spot. This dark line along the edge of the wing is pecu- 

 liar to this butterfly, and is seen in no other kind. The upperside 

 of Pallida is daintily tinted with faint brownish-yellow, and the 

 underside with clear yellow ; these tints may have seemed "pallid" 

 to Dr. Scudder when he named it, I know of no other reason for 

 the pallid name. 



Pallida has generally the same range as Venosa, restricted a 

 little at both the northern and the southern limits, so that it ranges 

 from Central California to Canada, west of the Sierra Nevada 

 Mountains, and running up into the high mountains to an altitude 

 of 7,000 feet. 



47. Pieris Castoria. Not elsewhere illustrated in accessible 



form. 

 Plate VI ; Figures 47, a, b, c. 

 Fig. 47, Male, taken at Oakland, Cal., June, 1894; Author. 



a, Male, underside, Oakland, Cal., April 25, 1894; 



Author. 



b, Female, San Juan, Cal., April 16, 1894; Author. 



c, Female, underside, Mt. St. Helena, April, 20, 1894; 



Author. 



