FAM. EMPIDID/E 219 
Kertész, Cat. Dipt. Vol. 6, p. 111 (1999); Lundbeck, Dipt. Dan. Vol. 3, p. 241 (1910); Wahlgren, 
Ent. Tidskr. Vol. 3r, p. 45, 85 (1910); Engel, Deutsche Ent. Zeitschr. 1918, p. 3 (1918); 
Brunetti, Fauna Brit. India. Dipt. Vol. r, p. 371 (1920). 
Characters. — Slender, long legged, dark colored species measuring about five millimeters. 
Head rounded, eyes very large, occiput little convex; front broad in both sexes, the sides strongly - 
converging toward the antenna, no fronto-orbitals, ocelli large and not elevated, face obliterated by the 
contiguity of the eyes except for a short narrow space beneath the antennae and at the oral edge, no 
cheeks; eyes of both sexes contiguous below, the middle anterior facets largest, finely pubescent, antennal 
excision strong; antenne located high up on the head, strikingly long, three-jointed, nearly bare, the 
first joint lengthened and cylindrical, the second globose, the third greatly drawn out, tapering gradually 
and without articulation into the arista; proboscis slender, vertical, slightly shorter than the head, the 
labrum as long as the slender labium, palpi about one-fourth as long as the proboscis, rather cylindrical, 
oné-jointed, decumbent and little hairy; occipital hairs sparse, uniseriate, enlarging above as bristles, a 
pair of long fine ocellar bristles present. Thorax arched, metathorax not declivous, no pubescence, 
bristles sparse but fine and long, one humeral, one posthumeral, no acrostichals, about four dorsocentrals, 
two notopleurals, two scutellars, one supra-alar and one postalar; pleure bare. Abdomen long and 
slender, not bristly, the segments marked with distinct lateral as well as transverse rows of pits; pygidium 
reflexed over the small eighth segment, consisting of a ventral piece which bears on the left front edge 
a prominent erect process and is tipped by a pair of small leat-like valves, penis hidden or long, slender 
and curved; seventh segment of the female broadly emarginate above, the sides lobose, the seventh 
sternite acute, eighth segment retracted. Legs long and slender, front coxce one-half as long as their 
femora and nearly twice as long as the posterior pairs, femora with some long fine flexor setze, posterior 
tibia with long bristles, pulvilli small. Wings narrow, costa continuing around the entire margin, 
basal bristle present, no stigma, auxiliary vein distinct, straight. vanishing just beyond the end of the 
anal cell, third vein with a long fork, discal cell located before the middle of the wing, the sections of 
the fifth vein nearly two to one, second basal cell longer than the first, anal cell small, its crossvein 
strongly recurved and continuous with the under side of the anal cell, anal vein replaced by a fold, not 
attaining the margin, discontinuous with the anal cell, no anal lobe, no alula, marginal fringe long, 
calypteres not at all fringed, their edge straight. 
Type species : T. /ougicornis, Meigen (Pl. 7, Fig. 69). Westwood, Gen. Syn. p. 132 (1840), 
cited this species as the type of Brachystoma, but since Blanchard the same year assigned vesrculosum as 
the type of Brachystoma it is best to accept his decision. 
Geographical distribution. 
1. T. albocincta, Boheman, Oefv. Vet. Akad. Fórh. Stockholm, Vol. 20, p. 80 N. Europe. 
[1863] (Brachystoma); Frey, Acta Soc. Sc. Fenn. Helsingfors, Vol. 37 
(3), p. 66 [1913] (albicincta); Ent. Tidskr. 1914, p. 8o (1914). 
2. T. fusca, Brunetti, Rec. Indian Mus. Vol. 9, p. 31 (1913); Fauna Brit. India. 
India Dipt. Vol. 1, p. 372, f. 35 (1920). 
3. T. longicornis, Meigen, Syst. Beschr. Vol. 3. p. 12, pl. 22, f. 6, 7 [1822] Europe. 
(Brachystoma); Macquart, Hist. Nat. Dipt. Vol. 1. p. 344 (1834) 
(Brachystoma); Zetterstedt, Dipt. Scand. Vol. zr, p. 363 [1842] (Bra- 
chystoma); Scholz, Zeitschr. Ent. Breslau, Vol. 5, p. 52 (1851] (Bra- 
chystoma); Walker, Ins. Brit. Dipt. Vol. 1, p. 103, pl. 3, f. 4 [1851] 
(Brachystoma); Zetterstedt, Dipt. Scand. Vol. 13, p. 5oo4 [1859] 
(Brachystoma); Schiner, Fauna Dipt. Austr. Vol. r, p. 87 (1862); 
Stein, Wien. Ent. Zeit. Vol. 22, p. 225 (1903); Lundbeck, Dipt. 
