218 
Psyche 
[December 
halteres black, their stem brown. Abdomen flat, shining black 
except for the gray lateral margins of the basal three and a half 
segments, and the silvery tip, which occupies the whole of the 
last segment and the anterior part of the fifth. On this segment 
the silvery band is broadly emarginate behind, so that it occupies 
but one-fourth of the segment at the middle, and then curves 
down to the hind angles; this segment is but little more than 
twice as broad as deep. The vestiture of the abdomen consists 
of very sparse, appressed, golden hairs and longer erect white 
hairs growing from black pittings on the gray lateral marks. 
The venter is gray, speckled with brown at the root of each hair. 
Legs with appressed whitish pubescence and with yellowish 
bristles, the inner side of the hind tarsi and of the end of the 
hind tibiae with dense silvery hairs, anterior tibiae rufous, rest 
of legs black in ground color. Wings hyaline, but with dark 
brown spots located at the very root, on the crossveins, bordering 
the ends of the veins at the wing-tip, and across the wing at the 
base of the discal cell as a much interrupted band, broadest 
and darkest in the marginal cell. The hyaline anal cell is closed 
in the margin, the posterior cells all open, and the fork of the 
third vein is broken at the base of the second submarginal cell, 
and there provided with a spur. 
Female . — Differs in that the gray covering is less pure, but 
sullied with brown on the face, front, pleural sclerites and venter. 
The end of the abdomen lacks the silvery pruinosity, but instead, 
the fifth segment has lateral gray triangles, the sixth is gray 
except for a median stripe, and the seventh is completely gray. 
The pubescence of the legs is duller and there is none of the 
silvery ornamentation. 
Types. — Male, Wawawai, Washington, May 1, 1909 (Wm. 
M. Mann). Two females from same locality, April 10 and 23, 
and two from Wallula, Washington, April, 1923 (P. G. Putnam.) 
A female paratype collected by E. L. Jenne, at North Yakima, 
Washington, September 18, 1903, is in the collection of the 
Washington State College. 
This large and distinct species can be quickly recognized 
in the male by the concave silvery mark on the fifth abdominal 
segment, and in the female by the spotting of the wings as well 
