Time of flight.—Species single brooded; butterflies to be found during late April and early May. I have taken the male as early May. I have taken the male as early as th 11th of April, but usually the first imagoes appear about the 20th. They become abudant by the first of May, after which time the females may be observed oviposting, and the males rapidly disappear. After May 10th worn individuals only are seen, some of which may endure even to the end the first week in June.