506 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 113 
to yellowish brown; mesopleuron bare except for several setae (about 
8 to 15) near the middle of the posterior margin; legs yellowish orange 
to yellowish brown, becoming darker distally; forefemora with the 
usual rows of posterodorsal and posteroventral bristles; midfemora 
with an anterior row of small bristles along the middle and a row of 
about 4 stronger bristles just below and toward the distal end; hind 
femora with about 4 or 5 strong bristles in a group near the distal 
end on the anterodorsal side; wings clouded with brown along cross- 
veins and ends of the second through the fourth longitudinal veins; 
abdomen yellowish orange, darkened along posterior margins. 
Lrenetu.—About 6.0 mm. 
Distripution.—Alaska, Northwest Territories, British Columbia, 
Oregon, Idaho, Wyoming, Minnesota, Michigan, Ontario, Tennessee, 
North Carolina, Pennsylvania, New York, New Hampshire, Massa- 
chusetts, Maine, Nova Scotia; March—September. 
Suillia longipennis (Loew) 
Figure 7 
Helomyza longipennis Loew, 1862a, p. 228 (Centuria 2, 90). 
Suillia longipennis (Loew), Czerny, 1924, p. 24. 
The long silky hairs on the legs of the male are the outstanding 
character of this species. 
Maur.—Body entirely yellow to yellowish orange, except aristae and 
posterior margins of abdominal segments brownish; no orbito-antennal 
spot; aristae plumose; 3 or 4 irregular rows of buccal setae; cheek-eye 
ratio from 0.40 to 0.45. 
Dorsum of scutellum almost completely covered with setae; meso- 
pleuron bare or with a few setae along the middle of the posterior 
margin; femora and tibiae with long silky hairs on ventral side; fore 
and middle basitarsi with similar hairs along posterior side; several 
strong bristles in distal half of middle and hind femora on anterodorsal 
side; wings usually with crossveins and ends of longitudinal veins not 
distinctly clouded, but the costal region may be slightly darkened; 
abdomen yellow, becoming dark brown along posterior margins. 
FEMALE.—Similar to male, but lacking the long silky hairs of the 
legs. 
Lenetu.—6.0-7.5 mm. 
DistripuTion.—Alaska, Yukon Territory, British Columbia, Idaho, 
Montana, Minnesota, Wisconsin, Michigan, Tennessee, North 
Carolina, Virginia, Maryland, Pennsylvania, New Jersey, New York, 
Ontario, Quebec, Vermont, New Hampshire, Maine, Nova Scotia; 
June—September. 
