1926] New Species of North American Dolichopodidce 45 
NEW SPECIES OF NORTH AMERICAN 
DOLICHOPODIDJE 
By M. C. Van Duzee, 
Buffalo, N. Y. 
Hydrophorus maciilipennis new species. 
Male: Length 3.5 mm.; of wing 4 mm. Face wide, but 
little narrowed above, upper portion green with only a little 
pollen; lower part opaque with yellow pollen. Palpi black with 
pale hairs. Front opaque with brown pollen. Antennae black, 
third joint small, nearly round; arista whitish at tip. Cheeks 
very narrow. Beard yellow, not very long or abundant, the 
black orbital cilia decend to the middle of the eye. 
Dorsum of thorax shining blackish with thin brown pollen, 
which is more abundant on the sides and ends abruptly a little 
below the pleural suture; pleurae bare, more greenish, the pollen 
white, contrasting strongly with that above; acrostichal and 
dorsocentral bristles very short, hair-like; propleurae with one 
black bristle and some small, pale hairs above each fore coxa; 
seutellum with two pair of marginal bristles. Abdomen green 
with brown pollen above, white on the sides, the line between 
being sharply defined; hairs of the abdomen very minute, black, 
white only on lower edges of the sides. Hypopygium concealed, 
with a pair of quite large, black lamellae projecting backward, 
they have a few pale hairs on upper edge. 
Fore coxae green, nearly bare, but with a few minute white 
hairs and several short, black, hair-like bristles on outer edge 
and one at tip; middle and hind coxae black with white pollen. 
Femora and tibiae green, their hair mostly black. Fore femora 
thickened, tapering to the tip, with one row of ten black spines 
extending nearly their whole length on lower anterior edge, lower 
surface with pale hairs. Fore tibiae with the usual row of spines 
on lower surface extending their whole length. Middle and hind 
femora with several bristles below, their tibiae with more numer- 
ous bristles below, the former with six, the latter with three 
