CHARLES P. ALEXANDER / 
Mesonotum very gibbous, brownish with a very broad brown median stripe 
and shorter, less distinct stripes on the sides of the praescutuin; scutum 
with the lobes gray, the middle area brownish; scutellum and postnotum 
grayish. Pleura light brown with a sparse gray bloom, deepest and brightest 
on the sclerites just in front of the base of the halteres. Halteres short, the 
stem pale, knob brown. Legs with the coxae and trochanters dull yellow, 
femora pale brown, a little darkened at the tips, tibiae and tarsi dark brown. 
Wings hyaline, the stigma present or absent, varying from subhyaUne to a 
dark brown, in shape full and rounded. Venation: Sc short, ending far before 
the origin of Rs; Sci about five times as long as Sci] Rs short, about equal in 
length to the basal deflection of R 4+5. 
Abdomen dark brown with a sparse gray bloom. 
Habitat. — Peru. Holotype, cf, Lima, Peru, altitude 500 
feet, August 19, 1914. (Parish coll.) Allotype, 9 , topotypic, 
August 11, 1914. Paratypes, 20 cf, 9, topotypic, August 3 
to 30, 1914; Matucana, Peru, altitude 7788 feet, one d" , July 
14, 1914. (Parish coll.) 
This insect agrees most closely with D. vernalis Philippi "^ 
(Chile), which is a larger species having the stigmal spot of a 
different shape and the abdomen of a very distinct pattern. 
In the shortness of the radial sector D. gihbera suggests D. 
omissa Alexander^ which has the cell 1st Mo open. 
Dicranomyia invalida sp. n. 
Antennae dark brown; thorax gray with darker stripes; wings with a brown 
blotch at the fork of Rs; abdomen dai'k gray, the hypopygium yellowish. 
Male. — Length, 5.5 mm.; wing, 8.5 mm. 
Female. — Length, 5.8 to 6.3 mm.; wing, 8.9 to 9.6 mm. 
Rostrum dull yellowish brown, palpi dark brown. Antennae dark brown, 
the flagellar segments subrounded to oval. Head light gray. 
Thoracic dorsum dull grayish yellow with brownish stripes, the median one 
broad, divided by a very narrow, pale inedian Une, lateral stripes short, behind 
becoming confluent with the middle stripe; scutum, scutellum and postnotum 
hght gray. Pleura gray. Halteres pale, the knob darker. Legs with the 
coxae dull yellow with a pale greenish tinge, trochanters pale, femora pale 
yellowish brown, a little darkened toward the tip, tibiae and tarsi brown. 
Wings whitish subhyaUne, stigma subquadrate, brown; an oval mark at the 
fork of Rs connected with the stigma ; seaming along the cord and outer deflec- 
tion of cell 1st M2 very narrow and indistinct. Venation: (see plate I, fig.4) 
Sc rather short, ending about opposite the origin of Rs; Sd about one-fifth 
'' 1865. vernalis Philippi, Verh. k.-k. zool.-bot. Ges. Wien, xv, p. 612 {Simno- 
bia) . 
* 1912. omissa Alexander, Can. Ent., xliv, p. 340, pi. XI, fig. o (Fur- 
comyia) . 
TRANS. AM. ENT. SOC, XLII. 
