103 THE BUTTERFLIES OF THE WEST COAST 



53. Euchloe Lanceolata. 



Plate VII ; Figures 53, b, bb, c. 



Fig. 53, Male, City Creek, Ca!., March 22, 1889; Author. 



b, Female, City Creek, Cal., March 12, 1891 ; Author, 

 bb. Female, Emigrant Gap, June 23, 1892; Author. 



c. Female, underside, Emigrant Gap, June 25, 1892 ; 



Author. 



Lanceolata is a well-known species ; a true mountain-flyer, it is 

 never seen on the plains, or near the sea, but it is found on the 

 highest mountains, and likes to fly about the snow-banks of the 

 higher peaks when the whole country in that vicinity is cold and 

 wet and sodden with the melted snow-water. In the south, where 

 there is no snow, it is apparently hunting for it all the time. It 

 appears early in the spring among the first butterflies of the 

 season. 



I have figured a good series, to show the variation : 53 and b, 

 are the normal male and female of the south ; bb, the normal 

 female of the higher mountains of northern California ; and c, is 

 the underside of the northern female. You will notice that the 

 northern specimens are lighter in apical coloring than the south- 

 ern ; the underside agrees with the upper in this, and it is anoma- 

 lous, for the contrary is the rule, that northern specimens are 

 darker than southern ones. 



Lanceolata has a range from St. Michaels, Alaska, to the Mexi- 

 can line, and doubtless it flies several hundred miles further south, 

 in the mountains of Lower California. 



The food-plants are the crucifers ; arabis perfoliata being the 

 favored plant in California, according to my repeated observations. 



54. Euchloe Creusa. 



Plate VII ; Figures 54, a, b. 



Fig. 54, Male, Slover Mountain, So. Cal., March 19, 1896; 

 Author. 



a, Male, underside, Tucson, Ariz., June 20, 1887; 



Author. 



b. Female, Ellensburg, Eastern Wash., May, 1891 ; 



Author. 

 This, and the three following species always show the round 

 white spot near the apices. In Creusa the bar at end of cell is 

 broad, cut by a white line, and does not reach the costa, being bent 



