1917] Van Duzee—New Diaphorus from the Western States 35 
long as the cross-vein; costa somewhat enlarged from the tip of 
the first vein to beyond the tip of second vein; anal angle prominent. 
Female: Front as wide as the face, covered with gray pollen, 
and with a black spot in the center which is quite conspicuous when 
viewed from in front; tarsi a little shorter than in the male, infus- 
cated from the tip of the first jomt. Abdomen and wings as in 
the male. 
Described from two males and one female taken at Wallops Is- 
land, Va., May 25 and June 1, by W. L. McAtee. 
This differs from D. opacus Loew in having the knobs of the hal- 
teres pale yellow, and having the first vein of the wing longer; 
from D. adustus V. D. it differs in having the tibiz, base of tarsi 
and knob of halteres yellow and the first vein longer. From D. 
contiquus Ald. to which it seems to be more closely related in 
having the tegule brown and the femora nearly bare below. 
Diaphorus junctus sp. nov. 
, Male: Length, 3-3.5 mm. Face blackish green, as wide as long; 
eyes contiguous on the front; antennz small, black, third joint 
somewhat rounded at tip but slightly indented where the arista 
is inserted which is to one side of the center; orbital cilia black. 
Thorax and abdomen dark green, quite shining but dulled with 
grayish pollen which often leaves three shining vittze on the 
thorax and a dark central line on the abdomen; incisures of the 
abdomen black; in some specimens there are coppery reflections 
on the thorax and in others the whole body is more steel-blue; 
pleurze more black than the dorsum; hypopygium small, the bris- 
tles at its tip strong but somewhat variable as to length, its ap- 
pendages usually invisible but in some specimens quite prominent, 
depending on the position of the hypopygium; they seem to consist 
of a claw-like hook directed toward the base of the abdomen and a 
pair of blunt appendages just back of this hook, a short central 
filament still further in, and outside of the hook a small rounded 
elevation fringed with hairs (this elevation can be seen in most 
species of the genus). Coxe, feet, tegule, their cilia and the 
halteres black. Fore femora with a row of black hairs along the 
lower posterior edge which are as long as the thickness of the 
femora; hind femora with only three or four below near the tip. 
Wings tinged with brown; veins black; first vein reaching half 
