Catalogue of the Nearctic genera

Keys Comparison Catalogue Terminology Notes

Asilinae
Asilus
Dicropaltum
Machimus
Negasilus
Neoitamus
Neomochtherus *
Philonicus
Polacantha
Prolatiforceps
Rhadiurgus
Tolmerus
Wyliea

Neomochtherus Osten Sacken, 1878
[Asilinae]

Neotropical	Nearctic	Palaearctic	Afrotropical	Oriental	Australian & Oceania
		typ.loc.

Description:	Osten-Sacken, C.R. (1878): Catalogue of the described Diptera of North America. Second Edition. - Smithsonian Miscellaneous Collections 16: 1-276 [82]; Washington.
Type species:	Asilus pallipes Meigen, 1820: 327
Synonyms:	Mochtherus Loew, 1849
Literature:	Martin, C.H. (1975): The generic and specific characters of four old and six new Asilini genera in the Western United States, Mexico and Central America (Diptera: Asilidae). - Occasional Papers of the California Academy of Sciences 119: 1-107; San Francisco [key].

Nearctic species:

Neomochtherus albicomus (Hine, 1909)

Neomochtherus angustipennis (Hine, 1909)

Neomochtherus californicus (Hine, 1909)

Neomochtherus hypopygialis (Schaeffer, 1916)

Neomochtherus idahoae Martin, 1975

Neomochtherus lassenae Martin, 1975

Neomochtherus latipennis (Hine, 1909)

Neomochtherus lepidus (Hine, 1909) [homonym]

Neomochtherus montanus (Hine, 1909)

Neomochtherus olympiae Martin, 1975

Neomochtherus oregonae Martin, 1975

Neomochtherus pallipes (Meigen, 1820)

Neomochtherus willistoni (Hine, 1909)

Neomochtherus californicus (Hine, 1909)

- male -

- female -

Key to the species

Founded on: Hine, J.S. (1909): Robber flies of the genus Asilus. - Annals of the Entomological Society of America 2(2): 136-170; Columbus. Martin, C.H. (1975): The generic and specific characters of four old and six new Asilini genera in the Western United States, Mexico and Central America (Diptera: Asilidae). - Occasional Papers of the California Academy of Sciences 119: 1-107; San Francisco. [amended]

	Eastern species.
	Western species.

	Occipital bristles black. Apical half of wings of male reddish brown apically, white basally. Tibiae yellow, apically narrowly black. Length 15-17 mm . . . . . Neomochtherus latipennis (Hine, 1909) [NY, MA, NC, MI, PA, OH, WV, VA]
	Occipital bristles pale. Apical half of wings dark, hyline basally. Tibiae black. Length 16-18 mm . . . . . Neomochtherus angustipennis (Hine, 1909) [NC, MD, VA, OH]

	Wings distinctly infuscated in males, more densely anteriorly.
	Wings in both sexes hyaline or slightly infuscated.

	General colour brown.
	General colour black.

	Mystax black above and white or sometimes golden below . . . . . Neomochtherus willistoni (Hine, 1909) [WA, OR, CA, AZ, UT, BCA]
	Mystax black around oral margin, laterally along gibba and above gibba, white medially . . . . . Neomochtherus oregonae Martin, 1975 [OR]

	Wings infuscated especially in the posterior half in males . . . . . Neomochtherus lepidus [homonym] (Hine, 1909) [CO, NM, UT, AZ]
	Wings reddish brown, more pale posteriorly in males . . . . . Neomochtherus olympiae Martin, 1975 [WA]

	Facial gibbosity small, not reaching half way to the antennae . . . . . Neomochtherus montanus (Hine, 1909) [CA]
	Facial gibbosity large, reaching more than half way to the antennae.

	Epandrium distinctly splitted apically into two lobes . . . . . Neomochtherus californicus (Hine, 1909) [CA, OR, ID, NV, BCF]
	Epandrium not or slightly splitted apically.

	Face white. Disc of scutellum almost without vestiture . . . . . Neomochtherus hypopygialis (Schaeffer, 1916) [UT, WY]
	Face yellow or brown. Disc of scutellum with long pale pile.

	Oral margin mystax bristles yellow, black above. Gibba grayish brown, face brown . . . . . Neomochtherus idahoae Martin, 1975 [ID]
	Oral margin mystax bristles white, black above, rather sparse. Gibba and face yellowish brown.

	Wings palely infuscated. Hind femora reddish-black anteriorly, dark red posteriorly . . . . . Neomochtherus lassenae Martin, 1975 [CA]
	Wings hyaline in both sexes. Hind femora reddish, somewhat darker posteriorly . . . . . Neomochtherus albicomus (Hine, 1909) [MT, ID, OR, CA, NV, UT]