Apocleinae
Amblyonychus
Eccritosia
Furcilla
Mallophora
Megaphorus
Nevadasilus
Proctacanthella
Proctacanthus
Promachella
Promachus
Efferia-group
Albibarbefferia *
Aridefferia
Carinefferia
Efferia
Nerax
Pogonioefferia
Triorla
Tuberculefferia

Nearctic species:

1. Albibarbefferia albibarbis (Macquart, 1838)
2. Albibarbefferia armatus (Hine, 1918)
3. Albibarbefferia bicolor (Bellardi, 1861)
4. Albibarbefferia duncani Wilcox, 1966
5. Albibarbefferia grandis (Hine, 1919)
6. Efferia incognita Forbes, 1987 [new combination is necessary]
7. Albibarbefferia leucocomus (Williston, 1885)
8. Efferia neosimilis Forbes, 1987 [new combination is necessary]
9. Albibarbefferia peralta (Wilcox, 1966)
10. Efferia sonorensis Forbes, 1987 [new combination is necessary]
11. Albibarbefferia tagax (Williston, 1885)
12. Albibarbefferia vertebrata (Bromley, 1940)
13. Albibarbefferia zonata (Hine, 1919)

 
 
 
 
 
 
 
 

- female -

 
 
 

	Males.
	Females.

	Upper lobe of the apical gonocoxite truncate (Forbes, 1987: 294 Fig. 4). Scutum clearly reddish. Hind tibia with acute dorsal and slightly rounded ventral swellings (Forbes, 1987: 294 Fig. 8). Length 20-25 mm . . . . . Albibarbefferia sonorensis (Forbes, 1987) [MEX, SON, SIL]
	Other combination of characters.

	Large flies, 25-40 mm in length (a few specimens of bicolor may be as small as 19 mm).
	Smaller flies, 20 mm in length or less.

	Hind tibiae apically bent forward and enlarged.
	Hind tibiae straight and not abnormally enlarged apically.

	Mystax white to yellow. Apical three-fifth of hind tibiae enlarged. Scutellar hairs white or yellowish. Tergites 6-7 white pollinose, 6 with black spot darsally. Length 29-32 mm . . . . . Albibarbefferia armatus (Hine, 1918) [TX, MEX?, TAM?]
	Part of the bristles of the mystax black. Apical two-fifth of hind tibiae anlarged.

	Femora reddish above. Hind tibiae only moderately enlarged. Scutellar hairs in part white. Length 24-31 mm . . . . . Albibarbefferia tagax (Williston, 1885) [AZ, TX?, NM?]
	Femora black, sometimes reddish at apex. Hind tibiae greatly enlarged. Scutellar hairs black.

	Upper lobe of the apical basistylus pointed (Forbes, 1987: 294 Fig. 3). Length 19-23 mm . . . . . Albibarbefferia incognita (Forbes, 1987) [TX, NM, MEX, CHA]
	Upper lobe of the apical basistylus rounded (Forbes, 1987: 294 Fig. 5). Length 25-26 mm . . . . . Albibarbefferia neosimilis (Forbes, 1987) [AZ, NM]

	Hairs and bristles of head all pale yellowish. Abdomen grayish white pollinose with short white hairs. Costa of wings not dilated but subcostal cell light brown. Length 25-34 mm . . . . . Albibarbefferia leucocomus (Williston, 1885) [KS, TX, OK, CO]
	Mystax in part black. Palpi at least partly black haired. Abdominal segments 2-5 or 2-6 black basally with short black hairs. Costa of wings dilated.

	Narrow basal section of tergites black haired. Normally two scutellar bristles. Epandria with ventral tooth at apical 4/5. Length 21-26 mm . . . . . Albibarbefferia bicolor (Bellardi, 1861) [MEX, CA, AZ, NM, TX, UT, LA, MS]
	Broad dorsum of tergites black haired. Usually 6 scutellar bristles. Epandria without ventral tooth. Length 32-35 mm . . . . . Albibarbefferia grandis (Hine, 1919) [TX, CA?, MEX?, TAM?]

	Mystax usually wholly pale. Frons at vertex as wide as at antennae. tergites 2-5 with two black spots dorsally. Radial-medial crossvein r-m at or slightly beyond middle of discal cell. Length 13-20 mm . . . . . Albibarbefferia albibarbis (Macquart, 1838) [WA, OR, CA, ID, NV, MT, WY, UT, AZ, CO, NM, ND, SD, KS, OK, TX, MN, IA, MO, AR, LA, WI, IL, MS, MI, IN, KY, TN, AL, OH, WV, VA, NC, SC, GA, FL, PA, NY, VT, NH, ME, MA, CT, NJ, DE, MD, DC, RI, MEX, GUA, VEN, ONT, BCA]
	Mystax in part black. Frons narrower at vertex than at antennae. Radial-medial crossvein r-m at two-thirds length of discal cell or more.

	Abdomen wholly gray and light brown pollinose, hairs white. Scutellar hairs and bristles white. Tibiae and tarsomeres yellowish to brown. Hypopygium reddish brown, apical flange of epandria black. Length 14-17 mm . . . . . Albibarbefferia duncani Wilcox, 1966 [AZ, MEX]
	Tergites 2-5 black basally with short black hairs.

	Hypopygium in dorsal view wider than the abdomen. Epandria with rounded ridge along the ventral margin. Fringe on gonocoxite of uniform width. Length 14-19 mm . . . . . Albibarbefferia vertebrata (Bromley, 1940) [CA, MEX, BCF]]
	Hypopygium narrower than the abdomen in dorsal view.

	Apical margin of the epandria straight, angle with axis about 60°, lower margin with a suggestion of a ridge. Fringe on gonocoxite much wider at base than at apex. Length 15-19 mm . . . . . Albibarbefferia zonata (Hine, 1919) [AZ, OR, CA, NV, UT, NM, OK]
	Apical margin of the epandria slightly convex, angel with axis about 80°, no suggestion of a ridge on the ventral margin. Fringe on gonocoxite of uniform width from base to apex. length 13-19 mm . . . . . Albibarbefferia peralta (Wilcox, 1966) [CA, MEX, BCF]

	Large flies, 25-40 mm in length (a few specimens of bicolor may be as small as 19 mm).
	Smaller flies, 20 mm in length or less.

	Mystax wholly white or yellow.
	Mystax with black bristles above and usually some below laterally, remainder pale yellow or white.

	Abdomen wholly white haired and yellow gray pollinose. Scutellum with white hairs and bristles. Ovipositor tapers from base to apex, 5.9 mm long . . . . . Albibarbefferia leucocomus (Williston, 1885) [KS, TX, OK, CO]
	Tergites 2-5 black basally and black haired, 6-7 largely black and black haired. Scutellar bristles black, hairs largely black. Oviporitor tapers on basal one-third, 5.6 mm long . . . . . Albibarbefferia armatus (Hine, 1918) [TX, MEX?, TAM?]

	Disc of scutellum with white hairs as long as scape and pedicel combined. Usually 1-2 black scutellar bristles. Ovipositor 5.6 mm long . . . . . Albibarbefferia bicolor (Bellardi, 1861) [MEX, CA, AZ, NM, TX, UT, LA, MS]
	Disc of scutellum all or in part black haired. Usually 4 or more marginal bristles.

	Femora reddish above on its whole length. Ovipositor 5.9-7.0 mm long . . . . . b>Albibarbefferia tagax (Williston, 1885) [AZ, TX?, NM?] and Albibarbefferia sonorensis (Forbes, 1987) [MEX, SON, SIL]
	Femora black, sometimes the tips reddish.

	Tergites 6-7 black and black haired. Ovipositor 7.1 mm long . . . . . Albibarbefferia grandis (Hine, 1919) [TX, CA?, MEX?, TAM?]
	Tergite 6 laterally and the sternite white haired.

	Ovipositor broad, 5.0 mm long . . . . . Albibarbefferia neosimilis (Forbes, 1987) [AZ, NM]
	Ovipositor longer, 5.2-6.3 mm long . . . . . Albibarbefferia incognita (Forbes, 1987) [TX, NM, MEX, CHA]

	Mystax usually all white. Frons at vertex as wide as at antennae. Radial-medial crossvein r-m at or slightly beyond middle of discal cell. Ovipositor 3.0 mm long . . . . . Albibarbefferia albibarbis (Macquart, 1838) [WA, OR, CA, ID, NV, MT, WY, UT, AZ, CO, NM, ND, SD, KS, OK, TX, MN, IA, MO, AR, LA, WI, IL, MS, MI, IN, KY, TN, AL, OH, WV, VA, NC, SC, GA, FL, PA, NY, VT, NH, ME, MA, CT, NJ, DE, MD, DC, RI, MEX, GUA, VEN, ONT, BCA]
	Mystax in part black. Frons at vertex narrower than at antennae. Radial-medial crossvein r-m at least at two-thirds length of discal cell.

	Tergites 1-6 wholly white haired and gray and brown pollinose. Ovipositor 4.4 mm long . . . . . Albibarbefferia duncani Wilcox, 1966 [AZ, MEX]
	Tergites black basally and black haired.

	Usually four bristles below on anterior side of hind femora. Scutum largely golden brown pollinose. venter of abdominal segments 1-3 with erect white hairs, tergite 3 with short black hairs basally. Ovipositor 4.0-4.1 mm long . . . . . Albibarbefferia peralta (Wilcox, 1966) [CA, MEX, BCF]
	Five to seven bristles below on the anterior side of hind femora. Scutum largely grayish pollinose. Sternites 1-4 or 1-5 with erect white hairs.

	Discal hairs of scutellum not longer than scape, half or largely black. Katepisternum with sparse hairs (about 15). Usually seven bristles on anterior side of hind femora below. Ovipositor 3.5-3.7 mm long . . . . . Albibarbefferia zonata (Hine, 1919) [AZ, OR, CA, NV, UT, NM, OK]
	Discal hairs of scutellum as long or longer than scape and pedicel combined, usually largely white. Katepisternum with tuft of hairs (about 30). Usually 5-6 bristles below on hind femora. Ovipositor 4.0-4.1 mm long . . . . . Albibarbefferia vertebrata (Bromley, 1940) [CA, MEX, BCF]

Contents: © Fritz Geller-Grimm, Jorge N. Artigas, 2007
Layout & images: © Fritz Geller-Grimm, 2007