HELEOMYZID FLIES NORTH OF MEXICO—GILL 561 
Neoleria tibialis (Zetterstedt) 
Figure 58 
Helomyza tibialis Zetterstedt, 1838, p. 767; 1847, p. 2456. 
This species has been confused in the literature and in collections 
with Neoleria prominens (Becker) and with the junior synonyms of 
N. prominens (Becker). JI examined the type, a specimen from 
Kengis, Sweden, in the collection at Lund, and found the species to 
be quite distinct from any other described species. 
MALE AND FEMALE.—Fronto-orbital plates, ocellar triangle, and 
back of head ash gray; front reddish orange on anterior half, becoming 
reddish brown posteriorly; antennae reddish orange, becoming brown 
on third segment; aristae dark brown to black, microscopically pubes- 
cent; face and cheeks dirty yellow; oral vibrassae strong, a single row 
of buccal setae; cheek-eye ratio about 0.45. 
Mesonotum ash gray; a dark brown median vitta between the 
dorsocentrai bristles and ending before the prescutellar bristles; 
dorsocentral bristles arising from dark brown spots which may fuse 
to give the appearance of a longitudinal vitta through each row and 
extending along the sides of the scutellum; all dorsocentral bristles 
strong; about 5 to 7 rows of setae between the dorsocentrals; prescutel- 
lar bristles weak, but distinguishable; scutellum bare except for 2 
pairs of lateral bristles; pleura ash gray, becoming brownish on upper 
half of mesopleuron; propleural bristles present; several setae in 
anterior corner of mesopleuron; usually 2 bristles in upper hind corner 
of sternopleuron, although the anterior bristle is sometimes much 
weaker than the posterior one; a few setae before the sternopleural 
bristles and longer hairs between the coxae. 
Legs with femora ash gray and swollen; distal portions of legs red- 
dish brown; wings hyaline with brownish tinge. 
Abdomen ash gray to black; terminalia yellowish brown. 
Lreneto.—4.0-5.0 mm. 
Distrrpution.—Alaska, Greenland? (Staeger, 1845). April—June, 
September. 
Genus Spanoparea Czerny 
Helomyza Fallén, Meigen, 1830, p. 47 (part).—Zetterstedt, 1847, p. 2430 (part). 
Blepharoptera Macquart, Loew, 1859, p. 57 (part). 
Spanoparea Czerny, 1924, p. 103; 1927a, p. 36. 
Spanoparea is not included in Curran’s (1934) key to the genera 
of North American Heleomyzidae—perhaps an indication that it 
was considered a synonym of Morpholeria. I have used general 
body coloration and length of antennal pubescence to separate these 
two genera in my key; however, it is the structure of the male termi- 
nalia which prompts me to consider the two distinct. I have examined 
