FAM. EMPIDID/E 7i 
nal arista as long as the antenna; proboscis short and thick, slightly projecting, palpi small and rounded. 
Thorax but little arched, without discal bristles, two scutellars; pleurze pollinose except the sternopleura. 
Abdomen long and cylindrical; pygidium small and rounded, beneath with six long bristles. Hind 
femora with a knee bristle, front tibiae fimbriate within with hairs, hind tibiae with some long apical 
spines, the lowermost curved, hind metatarsi spinulose above. Wings cuneiform, no anal angle, no 
stigma, pedicel of the second and third veins short, discal cell long, emitting two posterior veins, anal 
cell very short, the anal vein reflexed and abortive, anal vein complete. 
Type species : H. chloropa, Bezzi, the original species. 
Geographical distribution. 
1. H. chloropa, Bezzi, Nova Acta Akad. Naturf. Halle, Vol. 91, p. 385, f. 10- Peru. 
12 (1909). 
IO. GENUs SCELOLABES, PHILIPPI 
Scelolabes, Philippi, Verh. Zool.-bot. Ges. Wien, Vol. 15, p. 751 (1865); Reed, Ann. Univ. Chile, 
Vol. 78, p. 27 [1888] (Scelobates); Bigot, Ann. Soc. Ent. France (6), Vol. 9, p. 116 (1889); Bezzi, 
Nova Acta Akad. Naturf. Halle, Vol. gr, p. 3or (1909); Kertész, Cat. Dipt. Vol. 6, p. 104 (1909). 
Characters. — Polished, testaceous species with raptorial hind legs. Head globose, eyes very 
narrowly separated on the front, face linear, basal joints of the antennz short and subcylindrical, the 
third joint pubescent, long-conical, about twice as long as the basal two and terminated by a pubescent 
long slender arista; proboscis short and projecting obliquely forward, palpi ovate; ocellar triangle not 
elevated. "Thorax rather stout and strongly arched, almost bare of bristles and hairs, scutellum with 
two long apical bristles, one long prealar black bristle present. Abdomen subcylindrical. Legs pubes- 
cent and bristly, anterior legs simple, hind femora much swollen, with numerous fine setule and setze 
beneath and with irregular macrochetz, hind tibi; geniculate and much shorter than their femora, 
middle tibi; with four extensor bristles along basal half, pulvilli large. Wings with a rounded anal 
angle, costa stopping at the fourth vein, auxiliary vein very close to the first vein, first vein ending much 
beyond the middle of the wing, opposite end of'discal cell, third vein simple, pedicel of the second 
and third veins very short, arising near the end of the basal cells, the latter longer than the discal cell, 
nearly coextensive, the vein limiting the second basal cell oblique, discal cell emitting two veins, the 
fourth vein obsolete, anal crossvein inflexed, anal vein evanescent. 
Genotype and only species : S. bivillatus, Philippi. 
Geographical distribution. 
1. S. bivillatus, Philippi, Verh. Zool. Bot. Ges. Wien, Vol. 15, p. 751, pl. 28, Chile. 
f. 45 (1865); Bezzi, Ann. Mus. Hungar, Vol. 3, p. 458 (1905). — 
PI. 5, Fig. 43. 
Il. GENUS LAMACHELLA, NOV. GEN. 
Characters. — Polished, testaceous species with raptorial hind legs. Head globose, eyes of 
female separated on front and face, basal joints of antenne short and cylindrical, third joint lanceolate, 
arista slender, pubescent, shorter than third joint; proboscis projecting obliquely forward, piercing, 
palpi slender, long, porrect; ocellar triangle elevated. "Thorax strongly arched, almost bare, two small 
black prealar and two small scutellar bristles present. Abdomen subconical, terminal segments of 
