THE TRIBE OF THE WHITES 91 



striped with purple lines. The species is distinctly trop- 

 ical extending northward into our Southern states. 



Dr. G. B. Longstaff reports this species as abundant in 

 Jamaica where he found that the clubs of the antennae of 

 the living insects showed a beautiful turquoise blue color, 

 although another observer described them as bright green 

 with a tinge of blue. This is an interesting color variation 

 for a member of this group. In the tropics also there are 

 two forms, one belonging to the dry season and one to the 

 wet season. 



Synopsis of the Whites 



Imported Cabbage Butterfly {Pieris rapae). Expanse 2 

 inches. Upper surface white with a black marginal dash 

 on the front outer angle of the front wing. One round 

 black spot on each of the four wings in the male. Two 

 round spots on each of the front wings in the female and 

 one round spot on each of the hind wings. Under surface 

 of hind wings yellowish white; spots on front wings in same 

 position as on upper surface. A spring form (immaculata) 

 is smaller and the black spots are almost obsolete. 



Gray-veined White (Pieris napi). Expanse 2 inches. 

 Upper surface white with only a darker marginal splash 

 next the body. Under surface white with gray veins. 



Checkered White {Pontia protodice or Pieris protodice). 

 Expanse 2 inches. Upper surface white, strongly marked 

 especially in the female with dark grayish brown on both 

 pairs of wings. Along the outer margins these marks are 

 so arranged as to enclose white diamond spots. Male 

 with front wings only lightly marked and hind wings 

 scarcely marked at all. Under surface much like upper, 

 with a slight yellowish tinge in female. 



