FAM. EMPIDID/E IOI 
sometimes with femoral bristles. Anal angle well developed, costa encompassing the entire wing, basal 
bristle present, stigma present or absent, third vein acutely forked, the anterior branch not short, discal 
cell rather small, anal vein obsolete or thin, not attaining the margin. 
Tyne species : A. obscura, Philippi (Pl. 6, Fig. 56), the original species. The genus is related 
to Gloma but differs in the structure of the antenne.  Ttappears to be restricted to the West coast of 
South America. 
Geographical distribution. 
1. A. breviveniris, Philippi, Verh. Zool.-bot. Wien, Vol. 15, p. 762 [1865] Chile. 
(? Hilara); Bezzi, Ann. Mus. Hungar, Vol. 3. p. 444 (1905). 
2. A. cingulata, Bezzi, Nova Acta Akad. Naturf. Halle, Vol. gr, p. 383, f. g Peru. 
(1909). 
3. A. obscura, Philippi, Verh. Zool.-bot. Ges. Wien, Vol. 15, p. 753, pl. 29, Chile. 
f. 55 (1865); Bezzi, Nova Acta Akad. Naturf. Halle, Vol. gr, p. 383 
(1909). — PI. 6, Fig. 56. 
4. A. variegata, Bezzi, Aun. Mus. Hungar, Vol. 3, p. 450, f. 2(1905); Nova Peru. 
Acta Akad. Naturf. Halle, Vol. 91, p. 383 (1909). 
8. GENUS GLOMA, MEIGEN 
Gloma, Meigen, Syst. Beschr. Vol. 3, p. 14 (1822); Macquart, Hist. Nat. Dipt. Vol. r, p. 345 (1834); 
Westwood, Gen. Syn. p. 132 (1840); Zetterstedt, Dipt. Scand. Vol. 1, p. 439 (1842); Boitard, 
Man. Ent. Vol. 3, p. 321 (1843); Rondani, Dipt. Ital. Vol. i, p. 149 (1856); Bigot, Ann. Soc. 
Ent. France (3), Vol. 5, p. 562 (1857); Lioy, Atti Inst. Sc. Veneto, Venezia, 1864, p. 602 (1864); 
Becker, Berl. Ent. Zeitschr. Vol. 31, p. 131 (1887); Bigot, Ann. Soc. Ent. France (6), Vol. 9, 
p. r20 (1889); Coquillett, Proc. U. S. Nat. Mus. Vol. 18, p. 389 (1895); Williston, Man. N. 
Amer. Dipt. p. 75 (1896); Coquillett, Proc. Ent. Soc. Wash. Vol. 5, p. 250, 263 (1903); Bezzi, 
Ann. Mus. Hungar, Vol. 3, p. 451 (1904); Kertész, Cat. Dipt. Vol. 6, p. 111 (1909); Wahlgren, 
Ent. Tidskr. Vol. 31, p. 44. 85 (1910). 
Characters. — Opaque blackish species of about four millimeters length. Eyes bare, of the 
male contiguous on the front, the upper facets enlarged, of the female widely separated, ocellar triangle 
of the male prominent, located on the vertex, ocellar bristles long, no fronto-orbitals, face very short and 
broad, receding into the epistome, the mouth-opening strongly arched, occiput at least of the male with 
abundant hairs; antenne shorter than the head, apparently two-jointed due to the close growth of the 
last two joints, the first joint small, the second cyathiform, with a crown of long sete, the third joint 
reniform, bent down at the end and bearing a basal dorsal slender two-jointed arista, which is nearly 
three times as long as the antenna and is geniculate at the end of its first segment; proboscis short, 
fleshy, thick, horizontal, scarcely protruding from the oral opening, palpi short, cylindrical and with 
short hairs. Thorax not convex, devoid of pubescence, bristles long, one humeral, two posthumerals, 
seven or more dorsocentrals, three notopleurals, four or six scutellars, the acrostichals long and arranged 
as an irregularly biseriate median row; pleure bare. Abdomen twice as long as the thorax, hairy, 
especially in the male, pygidium small, directed backward, complex with small processes and provided 
with two short basal prongs and two trumpet-shaped posterior processes; abdomen of the female with 
a broad blunt termination. Legs slender, simple, in the male more elongate, more hairy, the hind 
femora ciliate and the hind tibie and metatarsi lengthened and slightly swollen, in the female certain 
of the extensor hairs of the tibia almost bristle-like. Wings very broad, the anal angle prominent, 
