Wikipedia
Bolbomyia
Bolbomyia is a genus of snipe fly, and the sole genus in the family Bolbomyiidae; until 2010, it was placed in the family Rhagionidae. They are a small 2 to 3.5 mm, brown or black in color, with lightly infuscate (darkened) wings. They are restricted to the north temperate region of North America and Russian Far East ( Kamchatka).