418 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Legs, — Pale ferruginous, or pale yellowish ferruginous (sal- 
mon orange) ; trochanters, anterior and intermediate tibiae and 
tarsi, generally paler; the following parts black: a narrow ring at 
apex of intermediate femora, a broader ring at apex of posterior 
femora, a narrow ring at apices of anterior and intermediate tibiae 
and segments of their tarsi, apical portion (from about half to 
two-thirds) of posterior tibiae, and posterior tarsi except often 
the last segment. Arolia small, especially on hind tarsi. 
WixGS. — Fore wings hj^aline, verj^ often faintly or very faintly 
clouded; costa whitish at base, brown basal to stigma; stigma 
brown to dark brown, rarely with a very small pale spot at base; 
costal cell hyaline, somewhat translucent beyond costal cross- 
vein; veins and nerves black, or blackish, sometimes brown. 
Hind wings hyaline, apical half very faintly clouded; veins brown, 
subcostal and basal portion of the externo-medial as a rule black. 
Male. — The male differs from the female as follows : clypeus 
apparently always with a white spot on each side, sometimes 
coalescing; very often the anterior dorsal margin of the prono- 
tum is narrowly margined with white, completely or interruptedly; 
rarely a small white spot on lower portion of the lateral face of the 
pronotum; the pale ferruginous on the mesopleura not so extensive 
sometimes; as a rule basal sterna of venter white; the black at 
apex of intermediate femora very often occurs only as a small 
spot; black at apex of intermediate tibiae rarely more extensive; 
posterior tibiae very rarely entirely black. 
Two males from an unknown locality had the greater basal 
portion of the abdominal dorsum very light brown, the black not 
having iuWy developed. 
Length. — Females, 9-11 mm.; males, 9-10.5 mm. 
Redescribed from many specimens of both sexes. 
Habitat. — Mt. Greylock, Amherst, North Adams, and Auburn- 
dale, Massachusetts (May to July inclusive); St. Johnsbury, 
Vermont (June); New Haven, and Farmington (Norton), Con- 
necticut (June) ; Capens, and Orono, INIaine (July and August) ; 
Durham, New Hampshire; Poughkeepsie, Ithaca, and McLean, 
New York (June to August inclusive); Delaware Water Gap, 
New Jersey (Viereck) ; Pennsjdvania ; Maryland; Virginia; Illinois 
(Norton); Wisconsin; "Western States" (Cresson). I have the 
