92 THE BUTTERFLIES OF THE WEST COAST 



Suffusa is a variety of Menapia, characterized by heavier dark 

 markings along the veins, and a tinge of red more or less obvious 

 on the margin of the hind wings. This is merely in degree, as all 

 Menapia that I have examined have a slight tinge of red on the 

 margin, and always this red is more obvious on the female. The 

 best specimens of SufTusa that I have seen are from the Mount 

 Shasta region of Northern California. 



Genus PIERIS 



The Pierids are all of them rather small in size, and with slender 

 bodies; wings mostly white, or lined and shaded dusky and 

 yellowish. The Genus covers the whole habitable world ; none are 

 very beautiful as butterflies go, but some of the tropical ones are 

 of good size. 



The eggs are pear-shaped, yellowish, ribbed ; and hatch in quick 

 time, in from seven to ten days. The caterpillars are green, six- 

 teen-legged ; and the larval life is from eighteen to twenty-two 

 days' length ; the pupa state is about eleven days' length, or may 

 last over winter, so that the butterfly may emerge in spring. 



Sex-marks : The pair of claspers at the tip of the body indi- 

 cate the males the same as in Papilio ; and the ornamentation of 

 the wings is generally obvious and distinctive. 



The food-plants are numerous indeed ; the cruciferous plants 

 of all kinds, both wild and cultivated, the clovers, and leguminous 

 or pod-bearing plants of many kinds, and many others. 



34. Pieris Beckeri. 



Plate V ; Figures 34, a, b, c. 



Fig. 34, Male, Cabazon, Cal., March, 1889 ; Author. 



a. Male, underside, Southern California, March, 1890; 



Author. 



b. Female, Pendleton, Oregon, July, 1891 ; Author. 



c. Female, underside, Pendleton, Oregon, July, 1891 ; 



Author. 



Pieris Beckeri is found all over the western part of the United 



States, from the Rocky Mountains to the Pacific Ocean, and from 



Mexico on the south to far up in British Columbia on the north. 



It is rather a northern butterfly, however, for it is larger and 



