Genus Nathalis Boisduval
Small yellow butterflies margined with black. Fore wings somewhat narrow and produced; antennæ quite short; upper radial vein in fore wing wanting. There are three species found in the subtropical regions of the New World, one of which invades our territory.
(1) Nathalis iole, Boisduval Plate C, Fig. 1, ♂; Fig. 2, ♀ (The Dwarf Yellow).
This little species, of which we give excellent figures, cannot be mistaken. Expanse 1.00-1.25 inch.
It ranges from southern Indiana and Illinois to Arizona, southern California, and northern Mexico. The larva feeds on Erodium cicutarium or pin-clover, and other Geraniaceæ.