102 THE BUTTERFLIES OF THE WEST COAST 



53. Euchloe Lanceolata. 



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



Fig. 53, Male, City Creek, Cal., 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 



