FAM. EMPIDID/E 223 
Eleven dorsocentrals, six scutellars; abdomen coarsely setose, 
side valve gray pruinose, twice ashigh as wide. . . . . P.sorivaca, nov. sp. (1). 
5. Coxa, halteres and calypteres blackish. . . . . . . . . P. MOoNOGRAMMA, S. Stt. 
Apex of coxa, base of femora, stalk of halteres, and calypteres 
vellüwIS EL UB Ne tucvei cq vods a a DMATISEDAVICOXA, BOY VA. 
9. GENUS OREOTHALIA, MELANDER 
Oreothalia, Melander, Trans. Amer. Ent. Soc. Vol. 28, p. 232 (1902); Coquillett, Proc. Ent. Soc. 
Wagh. Vol. 5, p. 254, 260 (1993); Melander, Williston's Man. N. Amer. Dipt. p. 224 (1908); 
Kertész, Cat. Dipt. Vol. 6, p. 119 (1909); Coquillett, Proc. U. S. Nat. Mus. Vol. 37, p. 580 (1910). 
Characters. —— Slender, opaque black species of the habitus of Climocera, but with the third 
vein simple and the anal crossvein abruptly turned back. Head oval, hanging vertically; eyes finely 
pubescent, widely separated on the face and front, facets uniform, emargination at the antennze distinct ; 
antenna inserted high up, the front very short, ocellar tubercle prominent, cheeks narrow, incised and 
separated from the face; proboscis very short, thick and flat, palpi small and broad; antenne short, 
contiguous, three-jointed, but the basal joint inset, third joint oval, its terminal arista apparently single- 
jointed, thickened, not hairy, nearly twice as long as the antenna; ocellar and upper occipital bristles 
present, lower occiput with sparse hairs. Thoracic bristles long and strong, no acrostichals, five 
dorsocentrals, one humeral, two intraalars, one supraalar, one postalar, a few notopleural setulz near 
the root of the wing, metapleure with a cluster of hairs; prosternum shorter than the mesosternum. 
Abdomen as long as the thorax, the first six segments of the male cylindrical, then suddenly smaller to 
accomodate the reflexed epipygium, penis conical, upper valves directed forward and thin and flat 
toward the tip, abdomen ofthe female blunt. [Legs slender, front coxa two times as long as the 
posterior pairs, front femora with strong thorn-like setule below on the apical two-thirds, hind tibize 
setose, no tibial spurs; claws long and slender, empodium long. Wings slender, costa continuing around 
the entire margin, a pair of strong basal bristles, costal setulze minute, auxiliary vein ending in the costa, 
first vein terminating before the middle of the. wing, stigma. very faint, third vein simple, discal cell 
complete, pentagonal, posterior cells sessile, fourth vein arising at one-third the length of the anal cell, 
triangular and short-hairy ; penis thickened, curving forward, the tip recurved. Legs ordinary, the middle femora below 
and the hind ones above with a row of setze. Stalk of halteres piceous; calypteres blackish 
Female. Lastabdominal segment compressed and shining. 
Type, Troy, Montana, August 10, 1916 (Melander). Nine Paratypes. all collected by author, at St. Regis Pass, 
Idaho-Montana; Priest Lake, Ídaho; Lake Keechelus, Lake Cushman, Ramparts of Mount Rainier, Washington; and 
Shasta Springs, California. 
Var. flavicoxa, vat. n. Stalk of halteres, calypteres, apex of coxa, trochanters and more or less of base of femora 
yellow. 
Type, Priest Lake, Idaho, August i, 1916 (Melander). "he penis is abruptly elbowed at the middle and its tip 
is widely recurved. Paratypes, male and female, Lake Keechelus, Washington. The penis of the paratype is gently 
curved. 
(1i) Proclinopyga solivaga, nov. sp. — Male. Length 2.2 mm. Notum olivaceous black, cinereous brown 
toward notopleural suture and on middle of abdomen, pleurz and sides of abdomen cinereous. Facets uniform. About 
eleven dorsocentrals, acrostichals long, six scutellars, two pale metapleural setulae. Abdomen coarsely hairy, expecially 
on sixth segment, the hairs of first segment and of sides of second pale, venter nearly bare, pittings very large; epipygium 
robust, erect, side valves distorted-oblong, heavily pollinose, hairy but not setose behind, dorsal prongs thin, curved 
preapical valves small and wiry, apical valves with small pointed tip, penis flat, bending forward near middle, its com- 
pressed base pollinose. Legs without distinctive characters. Stalk of halteres piceous ; calypteres blackish. 
Holotype, Van Trump Park, Mount Rainier, Washington, 21 July, 1922 (Melander). 
