FAM. EMPIDIDZ/E 37 
Mus. Hungar, Vol. 2, p. 321 (1904); Melander, Williston's 3d. Man. N. Amer. Dipt. p. 224 
(1908); Kertész, Cat. Dipt. Vol. 6, p. 9 (1909); Coquillett, Proc. U. S. Nat. Mus. Vol. 37, p. 610 
(1910); Wahlgren, Ent. Tidsk. Vol. 31, p. 42 (1910); Brunetti, Fauna Brit. Ind. Dipt. Vol. 1, 
p. 333 (1920). 
Characters. — Jet black species with black legs, hemispherical head, greatly arched thorax, 
clavate hind tibiz& and weak vein between the basal cells. Head relatively large, consisting almost 
wholly of the eyes, which in both sexes are subcontiguous below the antenne and have the facets of 
the upper half enlarged; outer antennal joint oval, with a long thread-like bare terminal arista; pro- 
boscis projecting horizontally but shorter than the head, palpi linear; no cephalic bristles. Thorax 
sparsely pilose, only a pair of notopleurals and a pair of scutellars developed bristle-like. Abdomen 
cylindrical, curved downward, pygidium terminal, small and closed; last two segments of the female 
abdomen tapering and drawn out to form a sort of ovipositor. Legs slender but the hind tibiae com- 
pressed clavate and the hind metatarsi swollen, middle tibiz with slender bristles, hind femora spinulose 
beneath, pulvilli rather small. Wings transparent, no stigma, costa with very short hairs and extending 
to the fourth vein, pedicel of the second and third veins very short, turned up at its origin, third 
vein simple, first posterior cell narrowed at the apex of the wing, discal cell smaller than usual, vein 
between the first and second basal cells very weak or wanting, anal cell acutely pointed, anal vein 
weak, no alula. 
Tyne species : S. opaca, Loew's first species, which was Coquillett's designation in 1903. 
Of the commonest species, folifa, the males differ from the females in having the tergites largely 
opaque, but of dorsalis the tergites of the female are opaque also. The Oriental species etwmera possesses 
greatly enlarged and spinose hind femora, and bears a similar relationship to the other species that 
Harpamerus does to Syneches. 
Geographical distribution. 
I. S. aterrima, Meijere, Bijdr. Dierk. Vol. 19, p. 53 (1913). Ceram. 
2. S. brevior, Meijere, Tijdschr. v. Ent. Vol 53, p. 68, pl. 4, f. 5 (1910). East Indies. 
3. S. dorsalis, Loew, Berl. Ent. Zeits.hr. Vol. 5, p. 320: Cent. r, no 26(1861); United States. 
Melander, Trans. Amer. Ent. Soc. Vol. 28, p. 254 (1902). 
4. S. elongata, Meijere, Tijdschr. v. Ent. Vol. 53, p. 67, pl. 4, f. 4 (1910). East Indies. 
5. S. eumera, Bezzi, Ann. Mus. Hungar, Vol. 2, p. 323, f. 2 (1904). New Guinea. 
6. S. nigripes, Zetterstedt, Dipt. Scand. Vol. r, p. 240 [1842] (Ocydromia); Europe. 
Vol. 8, p. 2996 [1849] (Ocydromia) ; Scholz, Zeitschr. Ent. Breslau, 
Vol. 5 (17), p. 48 [1851] (Ocydromia); Loew, Dipterenf. Südafr. 
p. 260 (1860); Roeder Wien. Ent. Zeit. Vol. 7, p. 96 [1888] 
(Fiybos) ; Strobl, Mitteil. Naturw. Ver. Steiermark, Graz, Vol. 29, 
P. 45 [1893] (Hybos); Wahlgren, Ent. Tidskr. Vol. 31, p. 47 (1910); 
Frey, Acta Soc Sc. Fenn. Helsingfors, Vol, 37 (3), p. 8 (1913). 
7. S. nitida, Loew. Oefv. Vet. Akad. Fórh. Vol. 14, p. 369 (1857); Dipterenf. Caffraria, Seychelles. 
Südafr. Vol. 1, p. 260 (1860); Collin, Ent. Mo. Mag. 699, p. 185 
(1922). 
8. S. opaca, Loew, Oefv. Vet. Akad. Fórh. Vol. 14, p. 369 (1857); Dipterenf.  Caffraria. 
Südafr. Vol. 1, p. 260, pl. 2, f. 44 (1860). 
9. S. parvicellulata, Bezzi, Ann Mus. Hungar, Vol. 2, p. 321, f. 1(1904); East Indies. 
Brunetti, Fauna Brit. Ind. Dipt. Vol. r, p. 333 (1920). 
10. S. folita, Loew, Berl. Ent. Zeitschr. Vol. 5, p. 321: Cent ri, n? 27 United States. 
(1861); Melander, Trans Amer. Ent. Soc. Vol. 28, p. 254, f. 83 
(1902). — PI. 5, Fig. 39. 
