274 DIPTERA 
Crossveins smoky; outer side of anterior femora with central clearer 
space in the dark area (variation with front femora nearly black); ; 
hind femora and tibize with middle palering. . . . . . . . T. INUSTA, Melander. 
5. Front femora G' with two round black marks inside; middle femora 
not tuberculate, hind femora dark; front tibiz closely setulose inside; 
second antennaljoint black. . . . . . . . . . . . . T. conrIcaus, Melander. 
Front femora G' with one large aud one or two small black spots inside; 
middle femora cf with tubercle at base beneath, hind femora with Pid 
middle pale ring; front tibie not setulose; antenne red . . . . T. ANNULARIS, nov, sp. (1) 
6. Palpi, halteres, legs and wings blackish . . . . . . . . . . T. WINTHEMI, Zetterstedt. 
Palpi, halteres, more or less of legs, and atleast base of wings paler . . . . . . . . . 7. 
7. Second basal cell but little longer than the first, its crossvein perpend- 
icular; proboscis reddishat base. . . . . . . . . en 
Second basal cell longer than the first by at least the length of the 
posterior crossvein; proboscis mostly or whollpblack . . . . . . . . . s. s s. MA 
8. Front coxz and femora cf marked with black, front femora ciliate MU e 
beneath with black hairs; sides of front c parallel; veins strong 
cg Q;hypopygium with black hairs above. . . . . . . . . T. BRáacHiALIs, Melander. 
Front coxz and inside of front femora not or inconspicuously marked; ; 
veins noL StrODE 7. o sco. To. n URL LIE TREAT EL S ME noce Mese 
9. Front tibie c incrassate apically, c* legs largely blackish, 9 legs 
more yellow, hind tibie tipped with black. . . . . . . . . T. craviees, Loew. 
Front tibiz not especially incrassate HEP Mud Mur x vU 78 DE 
10. Front femora c notciliated ; wings dark beyond the base; hypopygium : 
large; hind knees paler. , ^... . - 20e [e oe Ar. aao a o. o. VT NE 
Front femora ciliate beneath with pale hairs; wings uniformly gray; reis x 
tibi of uniform color... ... . . . s UU E POSEEN 
11. Middle tibize c with a strong excision before the apex; palpi brown; i 
hypopygium hairy; outer side of front femora with a black streak, ; 
two-fifths of the hind femora yellow; third section of the costa nearly 2 
fonrtimes thefourth. .. 2... . . .. . 7. X 7b owe RUBER. M OE 
(1) Tachypeza annularis, nov. sp. — Length3mm. Occiput opaque cinereous, with six black bristles above and nu- - 
merous whiteones below ; antennze red, the outer joint rounded oval, the subterminal arista four times the lengthof the antennz :- 
palpi white, with white hairs and two terminal whitish bristles ; proboscis reddish, with dark tip. Notum and pleure uni-- 
formly opaque cinereous, no humeral bristles. Abdomen opaque piceous, the shining black hypopygium relatively small, 
its upper lamellze with a few short hairs. Legs moderately strong and mostly yellow, the front femora C with a subapical 
black spot and a central round black dot on the flexor side, and with another black spot on the inside proximal to the middle, 
these three spots wanting in the Q, the outside of the front femora with a preapical black spot, more or less prolonged below 
in the 2, the hind femora and tibize with the basal and apicalthirds black, middle tibiz tipped with black and with a suffused 
dark band below the knee; front femora not ciliate or setuiose, middle femora black-setulose beneath and in the C' with a 
strong basal tubercle bearing several pale bristles, the front tibiae scarcely thickened and not setulose, the middle tibize 
closely setulose beneath and in the &' deeply excised near the tip. Halteres entirely pale yellow; calypteres with nine pale 
hairs. Wings hyaline, a little infumated at the middle, veins narrow, especially apically, the root of the fifth vein pale, the 
fourth vein gently curved forward, the third section of the costa scarcely three times the fourth section, posterior crossvein 
longer than the anterior, the distance between them equal to the anterior crossvein, the last section of the fifth vein three- 
fourths as long as the preceding section. à 
Fieldbrook and Santa Cruz Mountains, California (U. S. N. M.); Mount Constitution, Washington, 17 July, 1909. 
(2) Tachypeza exoiss, nov. sp. — Male. Length 4 mm.  Occiput pollinose, cinereous below, above with four 
stiff proclinate black bristles, the lower occiput with numerous white hairs; front cínereous, moderately narrow, widest at 
the ocelli, its lower sides parallel, ocellar bristles mínute : antennz yellow, the third joint lanceolate, the terminal brown 
