1916.] NATURAL SCIENCES OF PHILADELPHIA. 501 
•costal margin and the veins in the costal field with a fringe of long 
golden hairs. Venation (Plate XXV, fig. 12): Rs elongate, about 
one-half longer than the cell 1st M2. 
Abdominal segments brownish yellow with a subterminal brownish 
black ring in the male, lacking in the female. 
Habitat. — ^Eastern United States. 
Holotype, d^, Maryland, near Plummers Island, July 21, 1915 
(Alexander) . 
Allotype, 9 , Plummers Island, Maryland, July 21, 1915 
(Alexander) . 
Paratopotypes, 1 cf , 10 9 's, (McAtee and Alexander) ; paratype, 
9 , Dead Run, Virginia, July 21, 1915 (McAtee); cf , Lost Mountain, 
Cobb County, Georgia, July 13, 1913 (Bradley). 
Type in the collection of the author. 
This is probably the species that Osten Sacken referred to when 
he said ''immature specimens of a paler coloring (than sohrina), 
with uniformly pale feet, and without any trace of a darker tinge near 
the apex of the wings often occur. "^ These specimens do not 
represent teneral insects, but fully colored specimens of both sexes, 
some of them taken in copulation. Besides the pale coloration, the 
elongate sector will distinguish the species from sohrina (Plate XXV, 
fig. 11). 
Tribe Eriopterini. 
ERIOPTERA Meigen. 
Erioptera Meigen; lUigers Magazine, vol. 2, p. 262 (1803). 
Erioptera (Erioptera) laticeps sp. n. 
Head very broad; coloration dark, the humeral triangles pale; 
pleura marked with brown and yellow; abdomen banded brown and 
white; wings nearly hyaline. 
Male. — Length, 4.6 mm.; wing, 3.8 mm. 
Female. — Length, 5 mm.; wing, 4 mm. 
The specimens are described from alcoholic material. 
Rostrum and palpi dark brown. Antennse dark brown, the 
flagellar segments short-oval, more elongated toward the tip of the 
organ. Head very broad, especially behind; frontal tubercle dis- 
tinct. Head dark grayish brown, paler ijrown on the gense. 
Mesonotal prsescutum dark brown, the region before the pseudo- 
sutural foveae light yellow, triangular in outline; remainder of the 
mesonotum dark brown, the scutellum yellow. Pleura mottled 
brown and brownish yellow, the sternal region more brownish; a 
^ Monographs of the Diptera of North America, pt. 4, p. 119 (1869). 
