THE PIERIDS 



ing over this place from west to east apparently 

 against the wind for two days. Being white, they 

 can be seen at a long distance, and they come 

 along in twos, threes, and fours, and sometimes in 

 greater numbers, seldom stopping, going steadily 

 fifteen or twenty feet above the earth. A colored 

 man stated that they came into his field like a 

 swarm of bees, and he was so frightened at this 

 that he dropped his hoe and came home." 



The great Southern white is widely distributed 

 in the Gulf States ; it occurs also in the greater 

 portion of the southern continent as well as in 

 the West Indies ; it is a common species over a 

 large extent of territory. 



The Checkered White 



Pontia protodice (Pon'ti-a pro-tod'i-ce) 



Plate XIII, Fig. 2-6, and 9 



There are two forms of this species, which are designated as 

 Pontia protodice protodice and Pontia protodice vernalis re- 

 spectively. 



(1) The Typical Form, Pontia protodice protodice. — The 

 two sexes differ greatly in appearance. In the male the wings 

 are white above and below; at the outer end of cell R + M 

 of the front wings there is a dark bar which is usually divided 

 by a line of white scales on the medial cross-vein; there is 

 also a submarginal row of three more or less distinct spots, 



73 



