Albibarbefferia albibarbis (Macquart)

Erax albibarbis Macquart, 1838: 117 .

Recognition characters: Grayish to brownish species; length 16–19 mm; mystax white; mesonotum brown; scutellar setae white, 8 white, marginal bristles; wings hyaline, veins brown; male abdominal segments 1–5 and 8 gray, 6–7 white, 2 with small brown basal spots, 3–5 black basally usually bisected; female sides and posterior margins of abdominal segments grayish white pollinose, 3–7 black dorsally, venter white pollinose; male genitalia black, female ovipositor black brownish or reddish; femora black, tibiae and tarsi yellowish red, tips darker.

Distribution: Recorded from Wyoming (Table 1) by: Cannings (2013) (entire United States); Fisher & Wilcox (1997) (entire United States; as Efferia albibarbis); Geller-Grimm (2018); Scarbrough et al. (2012) (coast to coast in United States, southern Canada south to Venezuela; as Efferia albibarbis).

Habitat: Sagebrush steppe shrub and grassland vegetation type.

Ethology: Nothing known.

Prey: None known.