450 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
from slightly wider to very slightly narrow(!r than through them; 
supra-antennal ridges from moderately to (juite prominent. 
Thorax. — Black; tegulae quite often with a paler margin; 
meta-episternum rarety with a white spot. Mesoscutellum only 
slightly convex; meso-episternum quite sharply pointed, rarely 
only slightly. 
Abdomen. — Ferruginous; two to four basal terga, and venter 
from slightly at base down to third sternum, black; the sides of 
the basal tergum cream-white, but rather narrowly. 
Legs. — Black; the following parts yellowish, or straw color: 
anterior femora usually from slightly at apex to in greater part 
before, anterior tibiae except above, or behind, and the anterior 
tarsi (the basal segments as a rule darker above, or behind) ; the 
intermediate tibiae before, and its tarsi, from pale yellow-brown 
through brown to reddish brown (the basal segments of the latter 
as a rule darker above, or behind, and often blackish) ; the apical 
segment of the posterior tarsi brown, or reddish brown. 
Wings. — Fore wings pale honey -yellow ; costa usually dark 
brown, or blackish; stigma dark brown, rarely pale brown, slight 
basal portion usually paler ; costal cell strongly translucent ; veins 
blackish, or black, rarely brown. Hind wings hyaline, apical 
half faintly clouded. 
Male. ■ — The male differs from the female as follows: a small, 
or minute spot often on the lower portion of the cheek next to the 
eye; tegulae sometimes brown and sometimes pale yellow-brown; 
a pale yellow spot on the meta-episternum; abdomen with only 
the basal, and the second tergum in part, black; more or less of 
the anterior coxae and trochanters beneath quite often, and the 
anterior femora entirely or almost entirely before, yellowish, or 
straw color; anterior tarsi sometimes brownish with the basal 
segments above black ; the middle trochanters often beneath, and 
as a rule the middle femora in greater part or entirely before, and 
often the middle tibiae before, yellowish, or straw color. Head 
behind eyes more or less narrower than through them, and some- 
times as wide; supra-antennal ridges often prominent to only 
half-way toward the anterior ocellus; mesoscutellum from rather 
flat to slightly convex; meso-episternum from moderately sharply 
pointed to blunt. 
