HELEOMYZID FLIES NORTH OF MEXICO—GILL 557 
I have compared North American specimens with European material 
determined by various dipterists as Neoleria inscripta (Meigen) and 
conclude that they are the same. I have seen specimens determined 
by George Steyskal which indicate that he independently came to the 
same conclusion concerning the identity of the North American forms. 
Mate and FEMALE.—Ocellar triangle, vertex, and upper back of 
head grayish, the remainder of head yellow, becoming very pale below, 
aristae dark brown; oral vibrissae strong, a single row of buccal setae; 
cheek-eye ratio about 0.33. 
Mesonotum dark grayish brown or black with humeri and usually 
a portion of the scutellum yellowed in contrast; dorsocentrals weaker 
anteriorly, but all clearly stronger than the surrounding setae; pleura 
yellow or shaded with brownish in some areas; a single propleural 
bristle present; legs yellowish, becoming darker distally; femora 
swollen; wings hyaline, with costal spines relatively short; abdomen 
yellowish brown to brown, terminalia yellow; bristles along posterior 
margins of tergites 2-5, except near midline. 
Lenetu.—3.5—4.0 mm. 
DisrrinutTion.—Alaska, British Columbia, Washington, Oregon, 
Montana, Michigan, Ontario, New York, New Hampshire, Maine; 
April-September. Aldrich (1905) cited Lundbeck’s record of Leria 
humeralis (Zetterstedt), a synonym of N. inservpta (Meigen), from 
Greenland. 
Neoleria lutea (Loew) 
Blepharoptera lutea Loew, 1863, p. 28 (Centuria 3, 52). 
Lerta lutea (Loew), Aldrich and Darlington, 1908, p. 88. 
Neoleria lutea (Loew), Czerny, 1924, p. 125. 
I have examined two type males in the Museum of Comparative 
Zoology at Harvard University. These specimens resemble Neoleria 
inscripta (Meigen) very closely, including the structure of the termi- 
nalia, but the coloration is quite different in the two forms. 
The preceding description of N. inseripta (Meigen) will apply to 
N. lutea (Loew), except as follows: head entirely yellow; cheek-eye 
ratio from 0.28 to 0.36; thorax entirely yellow, may be darkened above 
to yellowish orange; no color contrast between humeri and (or) scutel- 
lum and remainder of mesonotum; legs yellow to yellowish orange. 
Lreneto.—4.0-4.5 mm. 
Distrinution.—Alaska, Oregon, California, Montana, Quebec, New 
Hampshire; April, July-September. 
Neoleria prominens (Becker) 
FIGURE 56 
(?]Helomyza tibialis Zetterstedt, Staeger, 1845, p. 367. 
Tephrochlamys prominens Becker, 1897, p. 402; 1907, p. 1. 
