XXXI, 20] ENTOMOLOGICAL NEWS 217 
conspicuous light yellow longitudinal stripe; wings with a faint brownish 
tinge, the stigma very faint; male hypopygium with the intermediate 
pleural appendage narrow basally, gradually widened, the acute outer 
angles subequal. 
o&. Length about 5 mm.; wing 5.5 mm. 
Rostrum and palpi dark brown. Antennae dark brown. Head light 
gray, with an indistinct, darker, median line. 
Pronotum dark brown, the lateral margins narrowly pale yellow. Meso- 
notal praescutum light brownish gray, with.three dark brown stripes; 
scutum brownish gray, each lobe with two brown spots; scutellum and 
postnotum dusted with gray. Pleura dark brown; a conspicuous light 
yellow longitudinal stripe across the dorsal portions of the mesosternum, 
extending from behind the fore coxae to dorsad of the hind coxae; cephalic 
portion of the mesepimeron yellow; dorsal pleurites dusted with gray. 
Halteres light yellow, the knobs brown. 
Legs with the coxae reddish brown; trochanters dull yellow; remainder 
of the legs obscure yellow; the tarsi darker. 
Wings with a faint brown tinge; stigma very faint, slightly darker 
brown; veins dark brown. Venation: Sc2 some distance from the tip 
of Scz, immediately beyond the origin of Rs; Rs but slighly arcuated, 
about as long as R2+ 3 and R2 taken together; 7 indistinct, inserted at 
about midlength of R2+3; cell rst M2 open; basal deflection of Cur 
before the fork of M, this distance being about one-half the deflection. 
Abdomen dark brown, the posterior margins of the segments indis- 
tinctly paler. Male hypopygium with the pleurites having three ap- 
pendages, the outermost flattened, the short apex produced into an acute 
point that is directed at a right angle to the remainder of the blade, some- 
what like the beak of a bird; the intermediate appendage is slender basally, 
gradually dilated into a fanlike structure, the outer margin concave, the 
lateral angles thus formed produced into acute or subacute, subequal 
points; inner pleural appendage a pale, flattened lobe that is gradually 
widened to just before the apex, the tip obtuse. Penis-guard distinctly 
trifid at apex. 
Habitat: Argentina. 
Holotype, o&, Rioja, February, 1915, (E. Giacomelli). 
Allotopotype, 1 Q, in poor condition. 
This fly is allied to G. velutina Alexander, G. weiseri new 
species, and other members of the subgenus in the Neo- 
tropical fauna but is readily told by the structure of the 
male hypopygium. 
Gonomyia (Leiponeura) bruchi new species. 
Antennae black, the scapal segments largely yellow; head yellow, the 
vertex with a brown blotch; thorax yellow, marked with brown; thoracic 
