Dioctria parvulus, n. sp. ♂.

Wholly black, shining. Pile of head light yellow, that on sides of face very sparse, extending to base of antennæ. First two joints of antennæ subequal in length, the third joint as long as the first two taken together; style one-sixth as long as the third joint, thick and blunt. Pile of thorax rather abundant, that on abdomen very sparse and short, bright yellow. Base of wings to beginning of fifth posterior cell yellowish-white, beyond this blackish; all posterior and the anal cell open. Length, 4 mm. Los Angeles County, Cal. Two specimens.