Triorla interrupta (Macquart)

Lavigne, Robert J. & Dennis, Steve, 2019, Robber flies (Insecta: Diptera: Asilidae) of Wyoming, USA with keys to genera and species, Zootaxa 4662 (1), pp. 1-126 : 61-62

Triorla interrupta (Macquart)

Asilus interrupta Macquart, 1834: 310 . Recognition characters: Brownish species; length 22–27 mm; mystax yellowish white, with 2 black bristles below and 4 above; mesonotum reddish, central stripe (broadly divided) and intermediate spots brown; yellowish gray pollinose, postpronotal lobe and lateral margins white; scutellum white pollinose, setae white, 8 or 7 strong and 2 weak, black marginal bristles; wings hyaline with light brown veins to reddish hyaline; male abdomen black basally, apical segments brown to reddish, segment 1, sides 2–5 and interrupted posterior margins 2–3 gray pollinose, 6–7 white; female abdomen grayish pollinose, base and narrow dorsum segments 2–3, 4–5 broadly and 6–7 narrowly black, and 4–5 broadly short black setae; dorsum of femora reddish, undersides and tibiae dark, nearly black.

Distribution: Recorded from Wyoming by Martin & Wilcox (1965) (entire United States).

Habitat: Saltbrush-greasewood shrub, and sagebrush steppe shrub and grassland vegetation types.

Ethology: Nothing known.

Prey: None known.