Diptera 83 c 
so stout and with much weaker and more widely spaced bristles; mid tibse 
in both sexes with one to four strong antero-dorsal bristles and three to five 
irregularly placed unequal-sized posterior bristles; hind tibia of male slightly 
curved, with a very pronounced apical callosity on ventral surface, the entire 
ventral surface with dense, short, erect hairs; hind tibia of female without a 
pronounced apical callosity and with much less distinct ventral hairs. Costal 
spines long and widely spaced; last section of fourth vein about 1-5 as long as 
preceding section. 
Length, 5-7 mm. 
Type locality: Bernard harbour, Dolphin and Union strait, Northwest 
Territories, July 10, 1916 (F. Johansen). Paratypes, same locality as type, 
August 1-7 and 14, 1915, and September, 1915 (F. Johansen). Thirty-five 
specimens. 
Differs from fenestralis Fallen, in being much larger and, in the male, 
in having the hind tibae with a very decided apical production or callosity, and 
in both sexes in having the cross-veins not infuscated. 
Leria Robineau-Desvoidy. 
Represented by one species in the collection. 
Leria fraterna (Loew). 
Scoliocentra fraterna Loew. Berl. Ent. Zeitsciir., 1863, p. 27. 
A male sj^ecimen, with data as follows: Nome, Alaska, August 24, 26, 1916 
(F. Johansen). 
This species has previously been recorded from Alaska, and is generally 
distributed in the United States and Canada. 
Neoleria, n. gen. 
Generic Characters. 
Similar to Leria, differing in having only two pairs of well-developed, 
postsutural; dorso-central, thoracic bristles. 
Genotype: Neoleria rotundicornis, n. sp. 
Neoleria rotundicornis, n. sp. 
Male. — Reddish testaceous, subopaque, upper portion of frons, occiput, 
dorsum of thorax except humeri and scutellum, greater portion of pleurae, and 
abdomen except the hypopygium, fuscous, with grey pruinescence. Wings 
faintly yellowish, veins pale brown. 
Frons less than one-half the head-width, orbits differentiated, each with 
two strong bristles and a few short setulae, interfrontalia with short setulse; 
antennae large, third joint almost orbicular, second very small; arista about 
as long as length of frons, with a short swelling at base, apical part not as slender 
as in Oecothea, with microscopic pubescence; eyes almost round, of moderate 
size; face almost perpendicular; cheek about half as high as eye, with a few 
short marginal bristles and one long vibrissa; proboscis stout; palpi normal. 
Dorsum of thorax with numerous moderately long setulose hairs and two pairs 
of postsutural, dorso-central bristles; scutellum short and broad, rounded in 
outline and subconvex on disc, bare except for the four marginal bristles; pro- 
pleural bristle strong; mesopleura bare except for a few setulae on anterior 
lower angle; sternopleura with one strong bristle and a few setulose hairs; 
pteropleura and hypopleura bare. Abdomen with short setulae and a few 
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