Machimus occidentalis (Hine),

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: 47-48

publication ID

https://doi.org/10.11646/zootaxa.4662.1.1

publication LSID

lsid:zoobank.org:pub:366A1E81-946C-4ED4-8A65-C51151FE87CC

persistent identifier

http://treatment.plazi.org/id/7708F17A-B80C-E533-63F1-FA5F62F5FD60

treatment provided by

Plazi

scientific name

Machimus occidentalis (Hine)
status

 

Machimus occidentalis (Hine) 

Machimus occidentalis Hine, 1909:147  .

Recognition characters: Grayish species; length 13–15 mm; mystax black above, white below; thorax brown and gray pollinose; scutellar setae white, 4 bristles, usually black although one or two may be white; wings hyaline with apex and inner margin faintly gray; abdomen gray pollinose with only a faint touch of brown dorsally; lateral setae and bristles on first abdominal segment white; legs black, femora may or may not have a preapical reddish band; tibiae reddish.

Distribution: ALBANY: Laramie, 1.6 km E, numerous records, 24 June–21 July ( RJL, SD); West Laramie, 11 July 1960 ( RJL). FREMONT: near Lander, 1,524 –2,438 m (5,000 –8,000 ft), July and Aug. ( RM-UK); Shoshoni ( FRH, RJL); HOT SPRINGS: Owl Creek Mtns., N end of Wind River Canyon, 1,829 m (6,000 ft), 25 June 1961 ( RJL). LARAMIE: Pine Bluffs ( FRH, RJL). NIOBRARA: Lusk, 19 km N, 64 km N, July 1895 ( RM-UK). PLATTE: Dwyer, numerous records, 1 May–28 June ( DRT, RJL); Glendo, ( FRH, RJL); Guernsey, 8 June 1981 ( RJL); Guernsey State Park, 14 June 1962 ( RJL); Hartville, 24 May–14–19 June 1963 ( RJL); Wheatland, 24 May–26 Aug. ( FRH, RJL). SWEETWATER: Rock Springs, 6, 9 June 1958 ( JW) (as M achimus hinei Fisher & Wilcox 1997  , three speci- mens in CAS). UINTA: Lyman, 25 June 1935 ( JB) (as Machimus hinei  , specimen in CAS). TETON: Jenny Lake, Grand Teton National Park, July 1931 ( VMT-BYU); Jenny Lake Grove, Grand Teton National Park, 20–30 June 1941 ( GEB-UCD). Recorded from Wyoming by: Dennis & Lavigne (1979) (as Machimus occidentalis  ); Geller- Grimm (2018); Lavigne & Pfadt (1964, 1965, 1966) (as Asilus occidentalis  ; grasshopper predator).

Habitat: Sagebrush steppe and wheatgrass-needlegrass shrub steppe shrub and grassland, and grama-needlegrass-wheatgrass grassland vegetation types. Protected gullies with Pinus ponderosa  cover; short- to mid-grass plains and areas where Artemisia tridentata  is dominant ( Dennis & Lavigne 1979); rangeland breaks with coniferous forest ( Martin 1975).

Ethology: Forages from both the ground and vegetation, depending on the temperature of the ground (see Dennis & Lavigne 1979).

Prey: DIPTERA  , HYMENOPTERA  , ORTHOPTERA  (see Dennis & Lavigne 1979; Lavigne & Pfadt, 1966, as Asilus occidentalis  ).

SD

San Diego Natural History Museum

CAS

California Academy of Sciences

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Asilidae

Genus

Machimus

Loc

Machimus occidentalis (Hine)

Lavigne, Robert J. & Dennis, Steve 2019
2019
Loc

Machimus occidentalis

Hine 1909: 147
1909