FAM. EMPIDID/E 215 
inflated in the male. Legs slender, front femora with a hooklike tooth at the base, the front tibize 
tuberculate below the knee and hairy, middle femora armed with a large apophysis a little beyond the 
middle on the upper anterior face, directed forward and bispinose at its tip, beneath with a fascicle of 
hairs and with three bristles, middle tibiz biseriately ciliate, hind tibiee dilated apically and produced as 
a lobe beyond the insertion of the tarsus, pubescent but not ciliate. Female unknown. 
Tyne species : the South American C. faradoxus, Philippi, which has not been found since its 
original discovery in 1865. This fly is well named for it is impossible to assign its systematic position 
with satisfaction. I take it that the slender legs and shortened front coxa bespeak a relationship with 
the Clinoceratinz, and that the Hemerodromia-like neuration is the result of parallel evolution. 
Geographical distribution. 
I. C. paradoxus, Philippi, Verh. Zool.-bot. Ges Wien, Vol. 15, p. 766, pl. 28, Chile. 
f. 46 (1865). — PI. 7, Fig. 67. 
2. GeENUs BOREODROMIA, COQUILLETT 
Boreodromia, Coquillett, Proc. Ent. Soc. Wash. Vol. 5, p. 247, 260 (1903); ibidem, p. 264 [1903] 
(Boreomyia); Aldrich, Cat. Dipt. p. 316 [1905] (Boreomyia); Melander, Williston's Man. N. Amer. 
Dipt. p. 223 (1908); Kertész, Cat. Dipt. Vol. 6, p. 119 (1909); Coquillett, Proc. U. S. Nat. Mus. 
Vol. 37, p. 515 (1910). 
Synamphotera, Melander (not of Loew, 1858), Traus. Amer. Ent. Soc. Vol. 28, p. 231 (1902). 
Characters. — Brownish species, measuring three millimeters in length. Head globular, 
occiput shallowly convex, below with sparse hairs, above with setze and two vertical bristles; ocelli 
placed well up on the vertex, one pair of ocellar and two pairs of lesser ocellar bristles; sides of the front 
broadly diverging. of the face parallel, cheeks linear, mouthopening very small; eyes bare, the incision 
at the antennze broad and shallow, lower facets becoming larger; antenna inserted below the middle of 
the head, three-jointed, the third joint conical, microscopically hairy, the arista half as long as the third 
joint, three-jointed, the basal joint small, the terminal joint thin and half as long as the intermediate ; 
proboscis short, rigid, somewhat incurved, the fleshy labella half as long as the proboscis, palpi obliquely 
descending, two-jointed, slender, hairy. Thorax quadrate, not greatly convex but without depressed 
prescutellar area, pollinose, not pubescent nor setulose, no humeral bristle, one notopleural, one 
postalar, four scutellar, about ten dorsocentrals, none large, no acrostichals; pleure bare, no pectal 
bristle. Abdomen compressed, not tapering, comprising eight segments; pygidium small, terminal, 
upper valves spatulate and erect, middle valves corneous and directed forward, central filament hidden ; 
no ovipositor. Legs slender, unarmed, hairy but without bristles, sete or spurs, front coxe one and 
two-thirds times as long as the posterior pairs, apex of hind tibiz closely fimbriate, pulvilli small. Wings 
cuneiform, narrow at the base, no anal angle or alula, costa encompassing the entire wing, a basal costal 
bristle, the costa biseriately hairy, auxiliary vein straight, evanescent at the tip, closer to the first vein 
than to the costa, humeral crossvein before the base of the second basal cell, second vein long, third 
vein not forked, its pedicel arising near the middle of the second basal cell, discal cell complete, emitting 
three veins, second posterior cell sessile, anal cell short, anal crossvein recurved around the back of the 
anal cell and separate from the ciliate margin, the anal vein represented by a fold which starts behind 
the anal cell. 
