THE CANADIAN ENTOMOLOGIST 201 
pleural membranes yellowish brown. Halteres yellow. Legs 
with the coxai and trochanters yellowish, remainder of the legs 
brown. Wings dusky gray, the stigma distinct; an indistinct, 
brown seam along the cord; veins dark brown. Venation as in 
fig. 5. 
Abdomen light brown with a broad, blackish, sublateral 
stripe on either side of the tergites; hypopygium small, brownish 
yellow; sternites brown. 
Female. — Slightly larger than the male, the basal segments 
of the antennai not so enlarged; flagellar segments oval, those 
toward the tip more attenuated; humeral portions of the thorax 
whitish yellow; abdominal tergites with the sublateral stripes 
somewhat narrower; tergal valves of the ovipositor pointed at 
their apices. 
Holotype, cf , Maywood, Alexandria Co., Virginia, October 19, 
1915, (W. L. McAtee); at light. 
Allotopotypes, 9 , October 15, 1915. 
Paratopotypes, 2 9 s, October 16-19, 1915. 
Type in the collection of the United States Biological Survey. 
A key to the nearctic species of the genus Erioptera (Empeda). 
1. Cell 1st M2 closed; body-coloration yellow 2. 
Cell Isf Mi open; body-coloration gray or brown. 3. 
2. Basal deflection of Cin beneath the middle of cell 1st M2; 
vein R2 oblique, diverging strongly from vein Rs (Eastern 
United States) 7iyctops Alex. 
Basal deflection of Cui before the fork of M; vein R2 not 
oblique, running parallel with vein Rz (Western United 
States) alicia Alex. 
3. Wings gray with an indistinct, brown seam along the cord; 
verticils of the male antennae not greatly elongated (Eastern 
United States) yioctivagans, sp. n. 
Wings subhyaline without a brown seam along the cord, only 
the stigmal region slightly darkened, verticils of the male 
antenucc greatly elongated 4. 
4. Body-coloration clear gray, including the thoracic pleura 
(Rocky Mt. Region) cinereipleiira, sp. n. 
Body-coloration reddish brown, the pleura reddish gray 
(Northeastern United States) stigmatica, O. S. 
