Hydatostega viridiflos

Hydatostega viridiflos is a species of long-legged fly in the family Dolichopodidae.

Subspecies
There are three known subspecies of H. viridiflos:
 * Hydatostega viridiflos fulvidorsum (Van Duzee, 1925)
 * Hydatostega viridiflos gratiosa (Aldrich, 1911)
 * Hydatostega viridiflos viridiflos (Walker, 1852)

According to BugGuide, H. v. viridflos is found along the coast of Northeast North America, while the other subspecies are found in Western North America.