128 DIPTERA 
vein abbreviated, first vein distinctly and closely setulose on its entire length except at extreme base, 
third vein forked, the anterior branch almost parallel with the axis, the posterior branch bent backward 
to terminate at the wing-tip, discal cell large, as long as the first basal cell, anal vein obsolete, anal 
angle well developed. no alula. 
Type species : P. lutea, Bezzi. Dr. Bezzi has forwarded the only known specimen which 
has served to check the preceding decaptiod and to make possible the accompanying illustration. 
Geographical distribution. 
1. P. lutea, Bezzi, Nova Acta Akad. Naturf. Halle, Vol. 9r, p. 382, f. 7, 8 Chile. 
(1909). — PI. 2, Fig. 15. 
17. GENUS HILAREMPIS, BEZZI 
Hilarempis, Bezzi, Ann. Mus. Hungar. Vol. 3, p. 443 (1905); Melander, Williston's Man. N. Amer. 
Dipt. Vol. 226 (1908); Bezzi, Nova Acta Akad. Naturf. Halle, Vol. 91, p. 302, 362 (1909); 
Kertész, Cat. Dipt. Vol. 6, p. 82 (1909). 
Heterempis, Brethes, Ann. Mus. Hist. Nat. Buenos Aires, Vol. 19, p. 92 (1909); Bezzi, Nova Acta 
Akad. Naturf. Halle, Vol. 91, p. 362, note (1909). 
Hilaropus, White, Proc. R. Soc. Tasmania, 1916, p. 226 (1917). 
Characters. — Opaque blackish species. Head globose, eyes of both male and female widely 
separated, face quadrate, hairy or bare, lower occiput hairy, upper occiput more bristly ; antennz shorter 
than the head, located near the middle, distinctly three-jointed, the basal joints not setose, the third 
joint conical with a short terminal style which is tipped by a small bristle; proboscis not longer than 
the head, rather strong but slender, vertical, palpi thickened, cylindrical, projecting forward but curving 
upward, setose beneath. — Discal bristles of the thorax small, one humeral, three prominent notopleurals, 
the acrostichals minute, arranged in two approximate or several rows, dorsocentrals small, scutellum 
margined with a variable number of bristles ranging from six to fourteen; pleurz bare. Abdomen with 
long loose hair, base of the second segment marked with two rows of pittings; pygidium usually strongly 
compressed and thrown forward over the abdomen, penis hidden. Legs not bristly, front tibie and 
metatarsi of the male sometimes shaggy, hind femora not thickened nor the hind tibiz shortened, front 
metatarsi of male often enlarged as in Hilara. Costa extending around the entire wing although 
sometimes thinner on the hind margin, anal angle broadly rounded, auxiliary vein straight, vanishing 
at the end, first vein swollen at the tip, upper branch of the third vein short, anal cell narrow, anal 
vein detached from the underside of the anal cell. 
Type species : H. nudifacies, Bezzi (Pl. 6, Fig. 54), by present designation. The genus is 
subtropical in its distribution, 
Geographical distribution, 
1. H. argentifera, Bezzi, Nova Acta Akad, Naturf. Halle, Vol. 91, p. 365,371 Chile. 
(1909). 
2. H. argentula, Becker. Mission Arc Méridien Amér. Sud, Vol. 1o, p. 169 Ecuador. 
(1919). 
3. H. argyrosona, Philippi, Verh. Zool.-bot. Ges. Wien, Vol. 15, p. 761 Chile. 
[1865] (? Hilara); Bezzi, Ann. Mus. Hungar. Vol. 3, p. 458 (1905); 
Nova Acta Akad. Naturf. Halle, Vol. 9t, p. 363 (1909). 
4. H. barbatula, Bezzi, ibidem, Vol. 9r, p. 365, 371 (1909). Peru. 
