HELEOMYZID FLIES NORTH OF MEXICO—GILL 593 
Matr.—Front reddish orange, darker towards vertex, remainder of 
head yellowish orange, except frontal plates, ocellar triangle, and upper 
back of head dusted with gray; arista dark brown, minutely pubescent; 
anterior and posterior fronto-orbital bristles approximately equal; 
ora! vibrissae strong; a second, weaker oral vibrissa located below the 
primary one on each side; buccal setae in 2 irregular rows; cheek-eye 
ratio 0.45 to 0.50. 
Thorax reddish orange, mesonotum sometimes brownish with a gray 
pollinosity; mesonotum with evidence of a narrow median vitta and 
lateral vittae through the dorsocentrals; mesopleuron with several 
tiny setae and a larger hair in the anterior corner near the propleural 
bristles, and several (about 5 to 7) setae near the middle of the posterior 
margin; 2 strong sternopleural bristles, with about 4 or 5 small hairs 
or setae anterior to the bristles, and the usual long hairs ventrally 
between the coxae; remainder of pleura bare. 
Legs yellowish orange to reddish orange, slightly darker distally; 
fore and hind basitarsi with a small ventral tooth at the distal end; 
hind basitarsi thickened and equal in length to the following segment. 
Abdomen reddish brown, with faint grayish pollinosity. 
FrmMaLe.—Similar to male, except basitarsi lack the tooth; the hind 
basitarsus is slightly longer than the following segment and is not 
thickened. 
Lrenetu.—4.0-6.0 mm. 
DisrripuTion.—Alaska, British Columbia, Manitoba, Michigan, 
Virginia, Maryland; March—July. 
Remarxks.—I have examined the type male of this species, which is 
in the Garrett collection. A similar male specimen in the U.S. 
National Museum is labelled ‘‘Zeria spinigerellus Mall., Type.” The 
label is in pencil, and I am not sure that my spelling of the species 
name is correct; it appears to be only a manuscript name. 
Czerny’s (1924) description of the European Heleomyza dupliciseta 
(Strobl) agrees rather closely with specimens of H. bisetata (Garrett) ; 
however, I examined a male and a female of H. dupliciseta (Strobl), 
sent to me by Dr. Willi Hennig, and found that the shapes of the sur- 
styli of the male terminalia are different in the two species. 
Heleomyza brachypterna (Loew) 
Fiaure 94 
Blepharoptera brachypterna Loew, 1873, p. 49. 
Blepharoptera latens Aldrich, 1896, p. 188. 
Leria latens (Aldrich), Aldrich and Darlington, 1908, p. 85. 
Leria caccabata Tucker, 1909, p. 301; 1911, p. 106. 
Helomyza brachypterna (Loew), Czerny, 1924, p. 150; 1927a, p. 43. 
Leria serrataria Garrett, 1924, p. 26.—Czerny, 1927b, p. 41. 
