Laphria vivax Williston

Laphria vivax Williston, 1883: 30 .

Recognition characters: Shining black species; length 14–22 mm; long setae of mystax black, decumbent pile yellow; thorax with short black pile, distinct blue reflection, tufts of setae elsewhere on thorax yellowish; scutellum with yellow setae and marginal upturned yellow and black bristles; wings nearly hyaline towards base, lightly clouded with pale brownish on outer part, veins reddish; abdomen with short black pile, thick longer yellow pile; legs black, setae on femora mixed black and golden, front and middle tibiae on outer side with yellow pile, trace of yellow pile on hind tibiae.

Distribution: TETON: 1.6 km S of Jackson Biological Research Sta., Moran, 6 July–23 Aug. as predator of Passaloecus relativus Fox ( Hymenoptera: Crabronidae) [Evans (1970)].

Habitat: Sagebrush steppe shrub and grassland vegetation type.

Ethology: Nothing known.

Prey: None known.