276 DIPTERA 
Middle femora not tuberculate, legs yellow except for the two femoral 
spots; wings smoky except base: humeri shining. . . . . . . T. HUMERALIS, nOV. Sp. (1). 
Geographical distribution. 
: or (^ annularis, nov. sp. : California. 
2. T. binotata, nov. sp. Washington. 
3. T. brachialis, Melander, Trans. Amer. Ent. Soc. Vol. 28, p. 343 [1902] E. United States. 
(Tachydromia); Coquillett, Proc. Ent. Soc. Wash. Vol. 5, p. 265 
(1903). 
4- T. clavipes, Loew, Berl. Ent. Zeitschr. Vol. $, p. 86 : Cent. 5, No. 73 North America. 
(1864); Coquillett, Proc. U. S. Nat. Mus. Vol. 18, p. 440 [1895] 
(Tachydromia); Melander, Trans. Amer. Ent. Soc. Vol. 28, p. 229 
[1902] (Tachydromia); Coquillett, Proc. Ent. Soc. Wash. Vol. 5, 
p. 265 (1903.) 
5. T. corticalis, Melander, Trans. Amer. Ent. Soc. Vol. 28, p. 343 [1902] W. United States. 
(Tachydromia) ; Coquillett, Proc. Ent. Soc. Wash. Vol. 5, p. 265 (1903). 
? portecola, Walker, List Dipt. Brit. Mus. Vol. 3, p. 506 [1849] (Tachydromia) ; 
Coquillett, Proc, U. S. Nat. Mus. Vol. 18, p. 440 [1895] ( Tachydromia) ; 
Melander, Trans. Amer. Ent. Soc. Vol. 28, p. 227 [1902] (Tackydromia). 
6. T. costalis, Roser, Correspondenzbl. Landw. Ver. Würtemb. Stuttgart, C. Europe. 
Vol. r, p. 53 [1840] (Tachydromia). 
7. T. discifera, nov. sp. — Pl. 4, Fig. 31. W. United States. 
8. T. distans, nov. sp. Washington. 
9. T. dolorosa, nov. sp. New Mexico. 
10. T. *egelata, Meunier, Ann. Sc. Nat. (Zool ) Vol. 7, p. 89, 98, pl. 4, Baltic Amber. 
f. 8-10 [1908] (Tachydromia). 
11. T. excisa, nov. sp. New York. 
12. T. fenestrata, Say, Journ. Acad. Nat. Sc. Philad. Vol. 3, p. 95 [1823] North America. 
(Sicus); Wiedemann, Aussereur. Zweifl. Ins. Vol. 2, p. 12 [1830] 
(Tachydromia); Say. Compl. Writ. Vol. 2, p. 82 [1859] (Sicus); 
Coquillett, Proc. U. S. Nat. Mus. Vol. 18, p. 440 [1895] (Tachy- 
dromia); Melander, Trans. Amer. Ent. Soc. Vol. 28, p. 228 [1902] 
(Tachydromia); Coquillett, Proc. Ent. Soc. Wash. Vol. 5, p. 265 
1903). 
s Loew, Berl. Ent, Zeitschr. Vol. 8, p. 85 : Cent. 5, No. 71 (1864); 
Coquillett, Proc, U. S. Nat. Mus, Vol. 18, p. 440 [1905] (Tachydromia) ; 
Melander, Trans, Amer. Ent. Soc. Vol. 28, p. 229, f. 55 [1902] (Tachy- 
dromía); Coquillett, Proc, Ent. Soc. Wash. Vol. 5, p. 265 (1903). 
base beneath, the end of the middle tibiz slightly but conspicuously excavated. Halteres white, the base of their stems 
yellowish; calypteres with five white hairs. Wings subhyaline, a little dusky in the middle where the veins are blackish, the 
fifth vein dark even at its base, the fourth vein parallel with the third except toward its end where it gently curves forward, 
the third section of the costa three times the length of the fourth section, posterior crossvein shorter than the anterior, the 
distance between them longer than either, outer sections of the fifth vein subequal. 
Two males from Pullman, Washington, July, 1998; another received from M. C. Van Duzee from Sacramento, Cali- 
fornia, June, 1915. 
(1) Tachypeza humeralis, nov sp. — Male. Length3mm, Humeri glistening black, legs yellowish, the front 
femora marked beneath with two round black spots. Occiput lightly cinereous, except a denser orbital line, occipital hairs 
sparse, antennze reddish, the terminal brown arista quite four times the length of the antenne, palpi whitish, proboscis 
reddish brown. Mesonotum lightly dusted, subshining, pleurz polished. Pygidium moderately large, shining black, its 
hairs sparse. Femora not ciliate, the femoral spots smaller than in bino!ata, front tibig not incrassate, middle femora not 
tuberculate, but with three spine-like setulz near base, middle tibize with a shallow preapical setulose excavation, apex of 
the hind tibiz indefinitely darker. Halteres pale, calypteres with five pale hairs. Base of the wings whitish, but the first 
and fifth veins dark to their root, fourth vein slightly convergent toward the third, distance between the crossveins equal to 
the anterior crossvein. 
One specimen, Washington, D C., August 17, 1913. 
