20 SOUTH AMERICAN TIPULIDAE 
a little proximad; the base is cylindrical, smooth, at about mid-length widened 
out into a subflattened blade whose inner margin is provided with about a 
dozen very obscure, appressed teeth, the tip produced into a long, sharp point. 
Habitat. — Colombia, Peru. Holotype, cf, La Cumbre, Col- 
ombia, altitude 6600 feet, May 18, 1914 (Parish coll.). Allo- 
type, 9, topotypic. May 15, 1914. Paratypes, 2c^, 29, topo- 
typic. May 18, 1914; Id", Matucana, Peru, altitude 7788 feet, 
June 15, 1914. 
Molophilus tenebricosus sp. n. 
Color dark brownish black; antennae elongate, sub-nodulose; ventral pleural 
appendage of the iriale hypopygium simple, curved, acutely pointed. 
Male. — Length, 3.5 to 3.6 mm.; wing, 4.6 to 4.8 mm. 
Rostrum and palpi dark brownish black. Antennae elongate, if bent back- 
ward extending nearly to the base of the abdomen, sub-nodulose, the segments 
enlarged at the base, the apex more slender, the segments clothed with long, 
outstretched hairs; antennae black throughout. Head dark browaiish black 
with a gray bloom. 
Thoracic dorsum dark brown with a sparse gray bloom, the anterior margin 
of the praescutum before the pseudosutural foveae and the lateral margin 
of the pronotal scutellum very pale yellow. Pleura grayish browai. Halteres 
rather stout, the base pale yellow, the knob more brownish. Legs with the 
coxae light yellow; trochanters yellowish brown; remainder of the legs dark 
brown. Wings dark brown, the venation as in plate I, fig. 10. 
Abdomen dark brownish black. The male hypopygium with the ventral 
pleural appendage (see plate IV, fig. 4) heavily chitinized, simple, slender, 
curved and ending in a sharp point. From between the pleurites there pro- 
jects an elongate, straight appendage of a yellow color which is presumably 
the penis-guard. 
Habitat. — Colombia. Holotype, cf, La Cumbre, Colombia, 
altitude 6600 feet, May 18, 1914 (Parish coll.). Paratypes, 36", 
topotypic. May 15 to 20, 1914. 
Genus TRIMICRA Osten Sacken 
Trimicra andensis sp. n. 
Male. — Length, 6.2 to 6.4 mm.; wing, 9.8 to 10 mm. 
Head and thorax gray, the latter with three brown stripes; wings gray spotted 
with brown on the cross-veins. 
Rostrum, palpi and antennae dark brownish black. Head light gray with 
several long black hairs. 
Thoracic dorsum light gray with three narrow dark brown lines on the prae- 
scutum; several long bla(;k hairs along these stripes; lobes of the scutum in- 
distinctly browned; scutellum pale, whitish; postnotum light gray. Pleura 
pale gray. Halteres pale Ijrown, the knobs darker. Legs with the coxae dark 
brown; trochanters j^ellowish brown; femora light Ijrown, broadly infuscated 
