590 PROCEEDINGS OF THE NATIONAL MUSEUM VoL. 118 
yellowish orange; antennae with segments 1 and 2 yellowish orange, 
segment 3 becoming dark brown distally; aristae minutely pubescent; 
a single irregular row of buccal setae; cheek-eye ratio from 0.50 to 
0.67. 
Thorax rather uniformly ash gray, with evidence of 3 brownish 
vittae on mesonotum; mesopleuron bare, except for several setae in 
anterior corner near propleuron, and very rarely a tiny seta along 
middle of posterior margin; sternopleuron with 1 strong bristle and 
several small setae near the bristle and longer hairs ventrally between 
the coxae; several (usually 3 to 5) pairs of prosternal bristles. 
Legs yellowish orange shading to dark brown or black on last 3 
or 4 tarsal segments; hind basitarsus of male longer than the following 
segment. 
Wings hyaline with faint brownish tinge, but no distinct infusca- 
tions; costal spines strong. 
Abdomen yellow to reddish brown (see ‘‘Remarks” below). 
Lrenetu.— 3.0-5.0 mm. 
Distrinution.—Alaska, Yukon Territory, British Columbia, Wash- 
ington, Oregon, California, Idaho, Utah, Wyoming, Montana, South 
Dakota, Minnesota, Iowa, Wisconsin, Michigan, Indiana, Tennessee, 
Kentucky, Virginia, West Virginia, Pennsylvania, New York, New 
Hampshire, Massachusetts, Quebec; collected throughout the year, 
usually more common in spring and early summer. 
Brotocy.—H. serrata (Linnaeus) has been reared from _ birds’ 
nests (Jussell, 1905; Waterston, 1910), and I have collected it in traps 
baited with excrement. Townsend (1893) recorded the species from 
dung and fungi. Cole and Lovett (1921) found the larvae in fungi 
and “‘hen manure.” 
Remarks.—Garrett’s variety nigricana is apparently based upon a 
single specimen. J! would hesitate to designate a subspecies in such 
a case. Garrett’s description of the variety vinus indicates that he 
considered it a seasonal variant, not a subspecies in the usual sense. 
In a large series collected at the same time and place, one may find 
considerable variation in coloration of the specimens; it seems unwise, 
therefore, to designate subspecies on this basis. 
Heleomyza genalis (Coquillett) 
FIGurE 90 
Leria genalis Coquillett, 1910a, p. 130.—Czerny, 1924, p. 160. 
I have examined the type female (No. 13104) in the U.S. National 
Museum; I also obtained a male specimen from the Garrett collection. 
The species resembles Heleomyza serrata (Linnaeus) except as follows: 
mesonotum uniformly blackish, without evidence of vittae; abdomen 
