558 PROCEEDINGS OF THE NATIONAL MUSEUM you, 113 
Leria crassipes (Loew), Aldrich and Darlington, 1908, p. 86. 
Neoleria rotundicornis Malloch, 1919, p. 83.—Czerny, 1924, p. 125. 
Leria septentrionalis Collin, 1923, p. 121; 1931, p. 90. 
Neoleria tibialis (Zetterstedt), Czerny, 1924, p. 122; 1927a, p. 30.—Malloch, 
1934, p. 22. 
This species has been confused by Czerny and others with Neoleria 
tibialis (Zetterstedt). Collin (1931) was aware of this confusion; he 
pointed out that the “tibialis recorded from Greenland by Staeger in 
1845 may well have been the same as septentrionalis,” which is here 
considered to be a junior synonym of N. prominens (Becker). Nielsen, 
Ringdahl, and Tuxen (1954) also noted that Czerny’s concept of 
N. tibialis (Zetterstedt) was incorrect. 
The specimens referred to as Leria crassipes (Loew) by Aldrich and 
Darlington (1908) were actually N. prominens (Becker). ‘These speci- 
mens are in the U.S. National Museum. 
The solid blackish of the mesonotum, without evidence of 
vittae, and the much weakened anterior dorsocentral bristles of N. 
prominens (Becker) will distinguish it from other North American 
species of the genus. 
MAL# AND FEMALE.—Similar to N. inscripta (Loew) except as fol- 
lows: front, vertex, and back of head dark gray to black; antennae 
darkened, with third segment becoming blackish; aristae black; cheek- 
eye ratio from 0.35 to 0.45; mesonotum entirely dark ash gray to 
black; dorsocentral bristles becoming gradually weaker anteriorly; 
pleura grayish brown to black; legs reddish brown to dark brown; 
abdomen dark ash gray; terminalia often becoming a yellowish orange, 
similar in structure to N. inscripta (Meigen). 
Lrenetu.—3.5—4.0 min. 
DistrrputTion.—Alaska, Northwest Territories, Manitoba, Green- 
land; May—August. 
Brotocy.—Collin (1943) recorded this species (as septentrionalis 
Collin) from the nest of Larus glaucus Linnaeus. I collected adults 
from a garbage dump, and Weber (1954) collected specimens from the 
carcass of a dog. 
Neoleria czernyi (Garrett) 
Postleria czernit Garrett, 1925a, p. 2. 
Neoleria czernyi (Garrett), Czerny, 1930, p. 447. 
This species was described from St. Paul Island, Alaska, from 10 
males and 2 females. I did not find any specimens labelled as this 
species in the Garrett collection or in the collections of the various 
institutions from which I have examined material. 
I suspect that this species may be synonymous with Neoleria 
prominens (Becker), but will postpone judgment until a type can be 
located. The original description is: 
