THE PIERIDS 



specimens expanding less than one and one-half inches. The 

 wings are canary-yellow above, with the apex of the fore 

 wings and the outer margin of both fore and hind wings 

 blackish brown. The border of the hind wings is narrow and 

 is sometimes wanting. 



There is a pale variety of the species, Eurema euterpe alba ; 

 this is represented by Figures 9 and 10 of the Plate. 



Caterpillar. — Three-fourths of an inch long; body, 

 downy ; color grass-green, with one or two wdiite lines along 

 each side. 



Food-plants. — Cassia and other legumes, preferring the spe- 

 cies with finely divided leaves. 



This is a pocket edition of the roadside butter- 

 fly, except that the black spot in the middle of 

 the front wing is reduced to a mere dot. Yet 

 though so small and fragile and with " flight 

 timid and feeble," it has taken possession of a 

 large portion of the United States ; it is found in 

 the South from the Atlantic to the Pacific, and it 

 has even gained a foothold in southern New Enc- 

 land and northern Ohio and Wisconsin. More 

 than this, there are on record two instances where 

 it invaded the Bermudas, flying with the wind the 

 six hundred miles from the mainland. The Ber- 

 mudans saw one day a " cloud coming from the 

 northwest " ; but when the cloud came nearer it 

 resolved itself into "an immense concourse of 



99 



