NORTH AMERICAN DITTEKFLIES. 25 



39a. Kathalis iole Irene Fitch. Differs from the tyjie, in the 

 absence of the three black spots on outer borders of the fore wings be- 

 low, and in having the base of the wing, instead of its outer margin, or- 

 ange. 



GENUS VI. 

 xVNTHOCHARIS. MARBLED BUTTERFLIES. 



Size, small. Colore, white or greenish white, with 

 hind wings below niarljled with greenish, and fore wings 

 of male often conspicuously marked with black and orange. 

 Antennae, shorter than one half the length of the body. 

 Fore wings, rather short, with the outer margin produced 

 into a more or less prominent angle. Hind wings lontr, 

 wide, but well rounded, their width bemg a little more than 

 three-fourths their length. Type, A. genutia. ( Plate II, 1. ) 



40. ANTHOCHARIS LANCEOLATA Bd. 

 Boisduval's Marbled Butterfly. 



Size, large, outer portion of fore wing with prominent angle. White 

 on both surfaces ; above, dusky at base of wings, with a marginal border 

 of indistinct white spots on apex and outer border of fore wings, within 

 which is another small, dusky spot, and at the end of central cellis a 

 sub-oval or crescent-shaped spot. Fig, 12, c. Hind wings, unspotted. 

 Beneath, the spot at end of cell of fore wing, is repeated, and apex and 

 upper border are sprinkled with a brownish-green tint; the hind wing is 

 thickly marbled with the same but most heavily on the basal two-thirds, 

 and there is an oblique white spot on the upper border. Female, simi- 

 lar but rather more heavily marked. This is the most slightly marked 

 species above, of any that we have within our limits. Expands 1. 10 to 

 1.1)0. Habitat, ^Northern California, Nevada, and Arizona. Occurs 

 from April until July. 



41. ANTHOCHARIS CREUSA Dolbl-Hew. 

 Creusa Marbled Butterfly. 



Size, small, about that of A. genutia, but the outer border of fore 

 wing is without prominent angle. White, with rectangular spot at end 

 of central cell of fore wing, not reaching upper border. Apex, dusky, 



