Neomochtherus Osten-Sacken, 1878

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 : 53

Neomochtherus Osten-Sacken

Neomochtherus Osten-Sacken, 1878: 82 .

Species found in Wyoming: Neomochtherus albicomus , N. auricomus , N. hypopygialis , N. lepidus , N. montanus , and N. willistoni .

Key to Species [adapted from Hine (1909) (as Asilus ); Nelson (1987)]

1 Facial gibbosity not reaching half way to antennae; mystax with few, mostly white bristly setae, few black above......................................................................................... Neomochtherus montanus

- Facial gibbosity reaching more than half way to antennae; mystax with many white to yellow or golden yellow bristles or setae below and at least a few black bristles or setae above......................................................... 2

2 Mystax with mostly golden yellow bristles and occasionally a few black bristles above; legs shining yellow to yellowish brown; elongate black marking on anterior side of femora; fore tibiae with long yellow bristles.......... Neomochtherus auricomus

- Mystax with light or white to golden bristles below and at least partially black above; legs brown, black or reddish; femora and fore tibiae not as above................................................................................. 3

3 Bristles and setae of body white; male and female wings hyaline or male wings brown to reddish brown all over.......................................................................................... Neomochtherus albicomus

- Bristles and setae of body not all white; at least male wings slightly clouded or brown towards apex or near middle of anterior half or yellowish hyaline............................................................................... 4

4 Face white; male and female wings hyaline, except slight clouding towards apex; disc of scutellum lacking long, white or pale setae......................................................................... Neomochtherus hypopygialis

- Face brown or golden to reddish brown; disc of scutellum with long, white or pale setae............................. 5

5 Face brown; male wings brown near anterior half of wing, female wings hyaline; disc of scutellum with long, white setae; femora and tibiae black to reddish...................................................... Neomochtherus lepidus

- Face golden to reddish brown; disc of scutellum with long, pale setae; male wings yellowish, female light yellowish to almost hyaline; legs light to dark brown...................................................... Neomochtherus willistoni