432 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
continued farther up toward the base and soincitimes all the way 
up), a usually interrupted longitudinal line on the anterior and 
intermediate tibiae above, a small spot at the base and the apical 
portion of the posterior tibiae, and posterior tarsi except apical 
segment faintly (rather brownish) ; basal segments of intermediate 
tarsi brownish above. 
Wings. — Fore wings usually faintly pale honey-yellow; stigma 
brown to dark brown, pale at base ; costal cell slightly translucent, 
sometimes moderately; veins and nerves blackish, sometimes 
brown. Hind wings hyaline, apical half usually very faintly 
clouded. 
Male. — The male differs from the female as follows: V-spot 
on prescutum often abbreviated and sometimes entirely absent; 
pectus, and mcso-episternum except a small longitudinally elon- 
gate spot on the upper anterior portion along and usually touching 
the meso-epimeron entirely straw-white, or straw color; meta- 
postscutellum sometimes entirely black; pale spots at juncture of 
terga large and somewhat diamond-shaped; venter except greater 
part of hypopygidium straw- white, or straw color; intermediate 
coxae as a rule without any black; posterior coxae with a longi- 
tudinal black band above (sometimes abbreviated apically) and 
sometimes with black on outside in addition; posterior trochanters 
with some black above ; posterior femora with a longitudinal band 
above (broader apically) and its tibiae almost entirely black. 
Wings. — Fore wings hyaline, or only faintlj^ clouded. 
Length. — Females, 9.5-13 mm.; males, 9.5-10 mm. 
Redescribed from fourteen females, including cotypes, and 
four males. 
This species may be, as pointed out by Norton (Trans. Amer. 
Ent. Soc, vol. 2, 1868-9, p. 230) Say's ventralis, but there is not 
sufficient evidence that it is, the type of ventralis being lost. 
Habitat. — Amherst, Pelham and Chester, Massachusetts 
(June to August inclusive) ; Dublin, Hanover and Durham, New 
Hampshire (July); Orono, Maine (July and August); Norwich, 
and Mt. Equinox, Vermont (June and July); Tiverton, Rhode 
Island (August); Ithaca, and Albany (Norton), New York 
(August) ; Delaware Water Gap, New Jersey (Viereck) ; Ohio ; 
Canada. 
