94 DIPTERA 
[1886] (Trichina); Becker, Berl. Ent. Zeitschr. Vol. 31, p. 133 (1887); 
Mik, Wien. Ent. Zeit. Vol. 6, p. 100 (1887); Strobl, Mitteil. Naturw. 
Ver. Steiermark, Graz, Vol. 29, p. 92 (1892); Bezzi, Bull. Soc. Ent. 
Ital. Vol. 3o, p. 144 (1899); Strobl, Wien. Ent. Zeit. Vol. 18, p. 26 
(1899); Lundbeck, Dipt. Dan. Vol. 3, p. 191 (1910); Wahlgren, 
Ent. Tidskr. Vol. 3t, p. 78, f. 9 (1910); Frey, Acta Soc. Sc. Fenn, 
Helsingfors, Vol. 37 (3), p. 59 (1913); Boitard, Man. Ent. Vol. 3, 
p. 322 (1843). — PI. 7, Fig. 63. 
fuscipes, Zetterstedt (not 1838, which is Trichina elongata), Dipt. Scand. Vol. 11, 
p. 4268 [1852] (Microphora); Strobl, Mittéil. Naturw. Ver. Steiermark, 
Graz. Vol. 46, p. 71 (1909). 
? holosericeus, Meigen (not 1838, which is Rhamphomyia gibba)  Classif. Beschr. 
Eur. Dipt. Vol. r, p. 231 [1804] (Emfis); Syst. Beschr. Vol. 3, p. 58 
[1822] (Rhamphomyia) ; Vol. 7, p. 89 (1838) (Rhamphomyia); Loew, Bemerk. 
Posen. Gegend Art Zweifl. Gatt. 1840, p. 21, f. 22; Isis, Vol 7, p. 549 
f. 22 [1840] (Rkamphomyia) ; Zetterstedt, Dipt. Scand. Vol. 1, p. 425[1842] 
(Rhaniphomyia); Walker, List. Dipt Brit. Mus. Vol. 3, p. 1o$ [1849] 
(Rhamphomyia) ; Scholz, Zts. Ent. Breslau, Vol. 5 (19), p. 5o(Mfcrophora) ; 
Schiner, Fauna Dipt. Austr. Vol. 1, p. roo [1862] (Rkamphomyia). 
? rufipes, Meigen, Syst. Beschr. Vol. 7, p. 78 [1838] (Tríchina); Schiner, Fauna 
Dipt. Austr. Vol. 1, p. 79 (1862). 
vicinus, Mik, Wien. Ent. Zeit. Vol. 6, p. 99 (1887). 
SuscENUS SCHISTOSTOMA, BECKER 
. I. Sch. eremita, Becker, Mitteil. Zool. Mus. Berl. Vol. 2, p. 47, pl. 4, f. 5 Egypt. 
(1902). — PI. 7, Fig. 62). 
2. Sch. nigrescens, Becker, Zeitschr. Hym. Dipt. Vol. 7, p. 121 (1907); Wien. Algeria. - 
Ent. Zeit. Vol. 28, p. 25 (1909). 
3. Sch. truncatus, Loew, Zeit. Ent. Breslau, Vol. 14, p. 48[1863](Microfhorus); C. Europe. 
Strobl, Jahrb. Naturk. Landesmus. Kürnten, Klagenfurt, Vol. 47, 
p. 201 [1901] (Microfhorus); Becker, Wien. Ent. Zeit. Vol. 28, p. 25 
(1909); Strobl, Verh. Zool. bot. Ges. Wien, Vol. 59, p. 177 [1909] 
(Microphorus). 
4. Sch. yahimensis, nov. sp. (1) Washington. 
4. GENUS HORMOPEZA, ZETTERSTEDT 
Hormopeza, Zetterstedt, Fauna Ins. Lappon. p. 540 (1838); Dipt. Scand, Vol. 1, p. 257 (1842); 
Bigot, Ann. Soc, Ent. France (3). Vol. 5, p. 562 (1857); Schiner, Fauna Dipt. Austr. Vol. 1, 
p. 111 (1862); Bigot, Ann. Soc. Ent. France (6), Vol. 9. p. 118(1889); Coquillett, Proc. U. S. 
Nat. Mus. Vol. 18, p. 389 (1895); Williston, Man. N. Amer. Dipt. p. 75 (1896); Melander, Trans. 
Amer. Ent. Soc. Vol. 28, p. 273 (1902); Coquillett, Proc. Ent. Soc. Wash. Vol. 5, p. 251, 263 
(1903); Melander, Williston, Man. N. Amer. Dipt. p. 224 (1908); Kertész, Cat. Dipt. Vol.6, p.83 
(1) Microphorus (Schistostoma) yakimensis, nov. sp. — Male. — Length 2.3 mm. Body entirely black 
but thickly overlaid with gray pollen, the conspicuous long hairs and bristles white, "Third antennal joint one and one-half 
times as long as broad and equal to the arista in length ; proboscis black, extending obliquely forward but not reaching 
beyond the strongly vaulted oral opening ; palpi with white hairs : occiput densely gray pollinose, the orbital bristles long 
and dense. Thorax faintly bilineate when viewed from in front, the acrostichals forming a double row, the dorsocentrals 
numerous, scutellum bisetose. Abdomen gray pollinose except for the seventh sternite and the large reflexed end of the 
epipygium; the penis and black ventral processes long, as in Becker's figure of S. eremíta, Legs entirely black though 
overlaid with gray dust, the bristles white, hind femora and tibiz ciliate. Calypteres white, densely fringed : halteres 
white, Wings hyaline, the veins brown, stigma very faint, no costal bristle. 
One specimen taken in April, 1915, at Yakima, Washington. 
