IjO SOUTH AMERICAN TIPULIDAE 
G. lachrymalis differs from G. tristis Loew ^^ in the lack of 
distinct stripes on the thoracic dorsum, the indistinct stigma, 
etc. 
Geranomyia insignis Loew 
1851. Aporosa insignis Loew, Linnaea Entomologica, v, p. 395. 
Nineteen specimens of both sexes from Duran, Ecuador, at 
the sea-level, collected June 25, 1914, by H. S. Parish. 
Geranomyia plumbeipleura sp. n. 
Rostrum black, paler at the tip; antennae black; head silvery gray, black 
on the vertex; thoracic stripes broadened in front, the pleura plumbeous ^ 
wings nearly hyaline, the caudal cells grayish, the tip infuscated, a few dark 
brown spots. 
Male. — Length, excluding the rostrum, 7.2 to 7.5 mm.; wing, 7.3 to 8 mm.; 
rostrum, 3.2 mm. 
Female. — Length, excluding the rostrum, 9.4 mm.; wing, 8.8 mm.; rostrum, 
3 mm. 
Rostrum long, nearly half as long as the body in the male, black, paler near 
the tip. Antennae dark brownish black. Front and the sides of the vertex 
adjoining the eyes light gray, remainder of the head blackish. 
Mesonotal praescutum light yellowish brown, the region before the pseudo- 
sutural foveae light yellow; three dark brown stripes, the middle one broadest 
in front where it suffuses the anterior end of the sclerite, narrowed behind; 
lateral stripes narrow, subsinuous; scutum with the lobes dark brown, the mid- 
dle portion grayish; scutellum and postnotum dark brown, the latter tinged 
with grayish plumbeous; in some specimens the scutellum is pale gray. Pleura 
grayish plumbeous including the lateral margins of the mesonotal praescutum; 
sternum yellowish brown, paler than the pleura. Halteres pale, the knob a 
little darker. Legs with the coxae yellow, the outer faces of the fore and mid- 
dle coxae a little suffused with brown; trochanters yellow; femora pale green- 
ish yellow at the base soon passing into brown, the tip broadly yellowish and 
including a broad subapical dark brown ring; tibiae and tarsi dark brown. 
Wings with the costal half nearly hyaline, the caudal half more grayish, the 
tip infuscated; a few dark brown markings as follows: at the base of Rs, a 
large mark at the stigma; along the cord and outer end of cell 1st Mi, on the 
supernumerary cross-vein in the subcostal cell; veins brown, paler in the pale 
areas on the costal half. Venation: (see plate II, fig. 4) Sc moderately long, 
ending slightly beyond the base of Rs; Sd at the tip of Sci; Rs about twice the 
length of the basal deflection of R4+5; cross-vein r-m very short, punctiform or 
obliterated by fusion; cell Isl Mo elongate; basal deflection of Cui just before 
the fork of M. 
Abdominal tergites dark brown, the sternites much paler, yellowish. 
The female is similar to the male; the gray color of the front continues back 
to the occiput as a narrow stripe, isolating a dark brown mark on the vertex 
'2 1851. tristis Loew, Linnaea Entomologica, v, p. 396 (Aporosa). 
