98 WASHINGTON UNIVERSITY STUDIES 
stripes; wings infumed with brown, more saturated along the 
costal margin; cell Mi petiolate; abdominal tergites with a black 
mark on the lateral margin at midlengthof the segment ; sternites 
with a black median mark at the base of each segment. 
Male: length, 13.4-13.5 mm.; wing, 13.5-13.6 mm. 
Female: length, 20-21 mm.; wing, 14 mm. 
Frontal prolongation of the head rather short and stout, 
brownish yellow, a narrow brown line along the side ; palpi with 
the three basal segments dark brown, the last segment brownish 
yellow except at the base. Antennae short, not much longer 
than the head, the three basal segments yellowish, the remain- 
ing segments dark brown, the extreme base of the segments 
light brownish yellow. Head shiny, brownish yellow. 
Thoracic dorsum rather dull, with three indistinct reddish- 
brown stripes, the middle one of which is bisected by a pale 
line; the scutum, scutellum and postnotum more shining. 
Pleura light brownish yellow. Halteres brown, the knob darker. 
Legs, coxse and trochanters dull yellow, femora brownish yellow, 
tibiae and tarsi brown. Wings light brown, the costal cell, 
stigma and anterior margin around to the apex much darker 
brown; veins dark brown. Petiole of cell Mi more than half 
as long as cell 1st M^. 
Abdominal tergites brownish yellow, the lateral margin more 
yellowish, a black spot about midlength of each segment on the 
lateral margin, most distinct on segments 2 to 7; sternites light 
brownish-yellow with a median linear black mark at the base. 
Hypopygium with the tergite deeply notched medially on the 
caudal margin; pleural appendage long, tapering to a long, 
slender point. 
Holotype, d", Okefenokee Swamp, Georgia, June 25, 1912. 
Allotype, 9 , topotypic. 
Paratypes, ten cf 9 , topotypic. 
This new species is readily separated from its allies by the 
very short antennae, the brown wings with the petiolate cell Mi 
and the hypopygium. The insect was apparently quite common 
on Billy's Island in the swamp. 
