60 Psyche [April 
posterior ones piceous, front coxae fuscous and with white hairs; legs dark 
fuscous, with whitish pubescence, middle tibiae setulose beneath, front 
femora somewhat the thickest, reddish beneath. Halteres yellowish; tegulae 
with a few white cilia. Wings clear hyaline, veins strong, hind margin short 
ciliate, marginal cell long, third and fourth veins parallel. 
Type male collected on a windowpane July 3, 1906, in my house at 
Pullman, Washington. ‘Type female taken in a wheat field nine miles 
west of Baird, Washington, June 23, 1908. This species was noticed 
actively running about the ground and stalks in wheat fields in several 
places in Central Washington. I have also five mounted paratypes 
which I collected at Lynden, Baird, and Pullman, all in Washington 
State. 
Tachydromia universalis sp. nov. 
Black, sparsely and lightly dusted; wings nearly uniformly hyaline; arista 
subterminal, the basal antennal joint red; palpi broad, white; legs reddish, 
variegated with brown; halteres yellow. . 
Male and female. Length 1.75 mm. Black, shining, lightly dusted with 
a gray pruinosity, which is more conspicuous on the pleurae, propleurae not 
glistening white. Antennae short, the two joints about equal in length, the 
basal joint red, the outer joint blackened, rounded oval, with a subterminal 
arista which is two and one-half times the length of the antenna. Front 
broad, its sides diverging above, the ocelli widely spaced. Upper facets 
minute, the lower ones larger. Palpi conspicuous, pendant, broad, white, 
with white hairs: proboscis black in the male, blackish in the females. Thorax 
comparatively broad, the humeri rather large but not long, the grooves rather 
distinet; acrostichals wanting, only a couple of weak dorsocentrals present 
near the scutellum; scutellum pruinose, and with two short bristles. Abdo- 
men depressed, shining jet black, but overlaid with a light coating of gray 
dust: hypopygium large, shining, provided with a stout curved end-process 
which projects to the right; sides of the abdominal segments with minute 
muscle-attachment pits, as in agens. Legs reddish yellow, the upper side of 
the hind femora, the ends of the tibiae and the last tarsal joint darker; front 
femora thickened, hind femora scarcely reaching the last third of the abdomen. 
Halteres yellow. Wings rather broad, hyaline, but with a faint smokiness 
following the veins; veins strong, dark, but becoming yellowish at the base 
of the wing; marginal cilia minute; hind cross vein making an acute angle at 
the lower corner of the second basal cell. 
Described from five specimens collected in the following widely 
separated localities: Chester County, Pennsylvania, June, 1902 (J. C. 
Bradley), Algonquin, Illinois, July 17, 1896 (Dr. Wm. Nason), and 
Austin, Texas. 
