This is in California the first buttefly to emerge in the spring, appearing in Feburary, though it is accepted representative of the Eastern Neglecta, which is not the first to appear there. Piasus is double brooded; the second brood coming in the latter part of April, and between it and the first brood a few days intervene when no Piasus are seen. Both broods are very fond of water, being always found on damp sands of wet places, and at the bookside crossings.