410 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
basal segments above faintly, th(! apical segment and the three 
middle segments of the posterior tarsi as a rule in part beneath. 
Wings. — Fore wings clouded, apical half strongly as a rule, 
with a subviolaceous tinge; costa from brown to nearly black; 
stigma brown to black, but usually dark brown; costal cell strongly 
translucent; veins and nerves brown to black. Hind wings hya- 
line, apical half faintly clouded; veins brown, the subcostal and 
the basal portion of the externo-medial as a rule darker; stigmal 
cell clouded. 
Male. — The male differs from the female as follows : the lower 
half or more of the clypeus, and a small spot on the metascutellum 
rarely, yellowish white or white; blue tint to abdomen fainter 
as a rule or wanting, and the posterior margin of the second 
tergum sometimes in part yellowish white; the basal half of the 
venter often irregularly straw color; apical third of the inter- 
mediate femora sometimes before, and a small spot usually at 
the apex of the posterior femora and tibiae before, straw color 
(often faint on latter). 
Length. — Females, 11.5-14.5 mm.; males, 11-12.5 mm. 
Redescribed from fifteen females and ten males. 
I have examined duhitata (MacG.) very carefully and find it to 
be the same as this species. The only difference of any conse- 
quence which I could find was in the color of the antennae (what 
is left of them), and the coloration of these is rather peculiar, 
varying from what may be termed dull pale brown, through red- 
dish brown, to black. The head and legs are reddish black, the 
normal deep black apparently not having fully developed. The 
abdomen, however, is blue-black, and the white on the mesoscutel- 
lum, though not extensive, is present. In addition, the character 
of the surface of the meso-episternum, the supra-antennal ridges, 
and other anatomical characters are unmistakably those of grandis. 
It appears to be only a color variant. Of interest, too, are the 
abnormalities in the venation in two of its wings (see Abnormali- 
ties) . 
Habitat. — Amherst, Blue Hill, and North Adams, Massa- 
chusetts (June); Cornish, New Hampshire (July); Farmington, 
Connecticut; Speculator, Ithaca, and Poughkeepsie, New 
York (June and Juty); Stockton, New Jersey; Pennsylvania; 
