1915.] NATURAL SCIENCES OF PHILADELPHIA. 491 
cell Mi, sometimes indistinct and difficult to detect; veins dark 
brown. Venation (see Plate XVI, fig. 13): R2 beyond cross-vein 
r long, persistent, much longer than R2+3; basal deflection of Ri+i 
nearly obliterated so that the radial sector is in a line with R^+i. 
Abdominal tergites with a dark brownish black, interrupted, 
dorso-median line; a much less distinct pale brown lateral stripe; 
ninth segment darker, brownish black; the caudal margin of the 
segments very indistinctly grayish; sternites pale brown. Male 
genitaha with the ninth tergite large, subquadrate, the caudal 
margin with a deep U-shaped notch, the lateral lobes subtruncate, 
not at all pointed. Ninth pleurite large, complete, with three 
appendages (see Plate XX, fig. 68) the outermost and most caudad 
is a flattened lobe which is narrowed into a sharp, curved point at 
the tip, the outer face of the blade of this appendage is densely 
provided with long, delicate, pale hairs; the next appendage consists 
of a broad foliaceous blade whose inner margin near the tip is pro- 
longed into a short, black, heavily chitinized lobe and whose main 
portion is produced entad and cephalad into a conical lobe; the 
third appendage, which lies the furthest cephalad but is almost as 
far laterad in position as the first appendage, is a slender fleshy lobe 
which is densely provided Avith long, coarse, black hairs. Ninth 
sternite deeply and profoundly split medially, at its caudal angle 
bearing a short, fleshy pendulous appendage as in this and related 
groups of species in this genus. Eighth sternite with the caudal 
margin broadly concave, this concavity with about a dozen long 
hairs, the sides of the concavity with a bunch of about five long 
reddish hairs. 
The female has the antennae indistinctly bicolored, the bases of 
the individual segments only slightly darkened; in some specimens 
the thoracic stripes are quite indistinct; ovipositor with the upper, 
valves broad at the base, rapidly tapering to the subacute slender 
point; lower valves shorter, compressed-flattened, blade-like, acute 
at the tip. 
Habitat. — Northeastern United States. 
Holotype, d^, Bennett Lake, Hope Township, Hamilton Co., 
N. Y., altitude 1,500 feet, September 12, 1912 (Alexander). 
Allotype, 9 , topotypic. 
Paratypes, No. 1, d^, Delaware Water Gap, Warren Co., N. J., 
July 9 (Johnson) ; No. 2, 2 d' 's, Manlius, Onondaga Co., N. Y., August 
20 (Comstock); No. 4, 2 d^'s, topotypic; No. 6, 5 cf 9 , Plummer's 
Island, Maryland, July 21, 1915 (McAtee and Alexander); No. 11, 
