102 DIPTERA 
costa stopping at the third vein, auxiliary vein distinct, straight, vanishing. before entering the costa, 
third vein forked, discal cell of moderate size, located a little before the middle part of the wing, anal 
crossvein abruptly recurved and continuous with the underside of the anal cell, anal vein obsolete, 
alula scarcely noticeable and with a close fringe; calypteres large, strongly margined. 
Type species : G. fuscibennis, Meigen (Pl. 6, Fig. 52; PI. 8, Fig. 74). The genus is dis- 
tinct in the Empidida in having a truly dorsal arista. Most of the species described as Gloma do not 
belong to this genus. Individuals of Gloma are rarely found. They live in ep fione and occur 
in Europe and North America. 
Geographical distribution. 
1. G. fuscibennis, Meigen, Syst. Beschr. Vol. 3, p. 14. pl. 22, f. 11 (1822); Europe. 
Macquart. Hist. Nat. Dipt. Vol. r, p. 345, pl. 8, f. 6 (1834); Blan- 
chard, Hist. Nat. Ins. Vol. 3, p. 582 (1840); Zetterstedt, Dipt. 
Scand. Vol 1, p. 439(1842); Boitard, Man. Ent. Vol.3, p.321 (1843); 
Schiner, Fauna Dipt. Austr. Vol. 1, p. 112(1862); Verrall, Ent. Mag. 
London, Vol. 19, p. 225 (1883); Strobl, Mitteil. Naturw. Ver. 
Steiermark, Graz, Vol. 29, p. 87 (1893); Wahlgren, Ent. Tidskr. 
Vol. 31, p. 85 (1910). — PI. 6, Fig. 52; PI. 8, Fig. 74. 
2. G. halterata, Becker, Mission Arc Méridien Amér. Sud, Vol. 10, p. 168 Ecuador. 
(1919). 
3. G. *? hirla, Loew, Bernsteinfauna, p. 41 (1850); Giebel, Ins. Vorwelt, Baltic Amber. 
p- 208 (1856). : 
4. G. luctuosa, nov. sp. (1). — PI. 8, Fig. 73. W. North America. 
5. G. ossicula, Becker, Berl. Ent. Zeitschr. Vol. 31. p. 132. fig. (1887). Alps. 
9. GENUS ITEAPHILA, ZETTERSTEDT 
Iteaphila, Zetterstedt, Fauna Ins. Lappon, p. 540 (1838); Dipt. Scand. Vol. r, p. 258 (1842); Bigot, 
Ann. Soc. Ent. France (3), Vol. 5, p. 559 (1857); Schiner, Fauna Dipt. Austr. Vol. r, p. 110 
(1862); Loew, Beschr. Eur. Dipt. Vol. 2, p. 250 (1871); Bigot, Ann. Soc. Ent. France (6), 
Vol. 9, p. 117 (1889); Coquillett, Proc. U. S. Nat. Mus. Vol. 18, p. 389 (1895); Williston, Man. 
N Amer. Dipt. p. 74(1896); Melander, Trans. Amer. Ent. Soc. Vol. 28, p. 331 (1902); Coquil- 
lett, Proc. Ent. Soc. Wash. Vol. 5, p. 251, 263 (1903); Melander, Williston, Man. N. Amer. Dipt. 
p. 226 (1908); Bezzi, Nova Acta Akad. Naturf. Halle, Vol. 9t, p. 3o2 (1909); Kertész, Cat. Dipt. 
Vol. 6, p. 80 (1909); Coquillett, Proc. U. S. Nat. Mus. Vol. 37. p. 556 (1910); Wahlgren, Ent. 
Tidskr. Vol. 31, p. 44, 64 (1910). 
(1) Gloma luctuosa, nov. sp. (PI. 8, Fig. T3). — Male. Length 3-, mm. Closely related to G. fuscipennis, 
Meigen, but entirely black and with different proportions to the parts of the pygidium, The basal dorsal process is rela- 
tively robust, more setose and its distal fork shorter than in the European species, "The main end-valve is broad, stout and 
roughly triangular, the posterior valve is heavily setose and with crenulate posterior margin. In fuscipennis the main valve 
is narrow, inverted bootshaped and the posterior valve has only two apical and about two basal setze, A pair of anteriorly 
directed delicate sinuous processes with deflected tip arise from the middle of the pygidium between the dorsal and main 
valves, and these are straight in fuscipennis. 
Four males and four females, taken by the author in the heavy forest on the Fairfax Trail just Northwest of Indian 
Henry's Hunting Ground on Mount Rainier, Washington, August 9, 1922. 
Another mountain species of Gloma has been collected on Mount Constitution and along Hoods Canal, Washington, 
on Mount Hood, Oregon, and on Lookout Mountain near Priest Lake, Idaho, As all the specimens are female the species 
is not described here. This form has the legs, halteres, abdomen and base of wings largely yellowish, as in n— but 
it is only two-thirds as large as that species. — ' 
