70 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Gypsy Moth Parasite Laboratory, Melrose Highlands, Mass., two; 
collection of author, one. 
Anterior face of posterior femur with two complete rows of bristles, 
an upper and an intermediate, bristles of latter very long and stout; 
only a few bristles of lower row retained distally; anterior acrostichals 
absent; two sternopleurals. 
Length: 8 to 12 mm. 
Head. — Viewed from side parafrontals and genae with dark re- 
flections. Breadth of front at narrowest part from one fourth to 
about two sevenths eye width; cheek height approximately two 
sevenths that of eyes. Front very prominent; inner orbits of eyes 
on its upper part converging downward; sides of frontal vitta rarely 
parallel, usually converging backward, not drawn in at base. Second 
antennal joint blackish; third about twice length of second, often 
broadest at tip; arista shortly plumose on basal half to two thirds. 
Back of head strongly convex, behind eyes with black cilia nearly 
do"v\Ti to foramen; metacephalon clothed with faintly yellowish hairs 
just beneath foramen, otherwise its vestiture black. Palpi dark. 
Chaetotaxy. — Lateral verticals absent; vibrissae on a line with oral 
margin. 
Thorax. — Metanotum clothed with hair that inclines slightly 
backward. Sutural ridge bare. Hairs covering anterior spiracle 
dark brown basally, their tips somewhat lighter; those of anterior 
margin of posterior spiracle dark brown, spiracular cover browmish, 
with sometimes a narrow, sometimes a wide golden-brown or yellow- 
ish-brown border. 
Wings. — Bend of fourth vein normally an acute angle; anterior 
cross-vein behind end of first longitudinal; third vein bristly; costal 
spine vestigial; section IH of costa equal to or slightly greater than 
section V; alulae fringed with short hair; calypters whitish, outwardly 
fringed with white hair. 
Legs. — Dark. Posterior trochanter with ' brush ' ; femur cy- 
lindrical, often slightly arched, clothed beneath with long hair. 
Anterior face with two complete rows of bristles, an upper and an 
intermediate, bristles of latter very long and stout ; only a few bristles 
of lower row retained distally; posterior face of femur, also of tibia, 
with a beard of long, coarse hairs ; anterior face of tibia with a similar 
beard of shorter, less dense hairs on its distal three fourths; tibia 
straight or slightly curved; tarsus shorter than tibia. Middle coxa 
