160 Psyche [Sept.-Dee. 
of the front; middle transverse row of four equidistant bristles 
forming a practically straight line, its lateral bristles placed 
midway between the lower and upper lateral bristles. Surface 
of front slightly shining, but not polished, sparsely clothed with 
short hairs, the frontal bristles large and stout. Antennae small, 
with long, pubescent arista. Palpi very small, with three or four 
large bristles below. Cheeks each with three stout downwardly 
directed bristles below and a series of smaller ones extending 
upward to the antennae. Postocular cilia of normal length. 
Mesonotum narrow, its surface shining, clothed with dense short 
hairs; one pair of dorsocentral bristles. Scutellum subtrian- 
gular, with four well developed bristles. Propleura with two 
stout bristles at the lower anterior angle and one just below the 
spiracle. Mesopleura with a patch of hairs above and a con- 
spicuous bristle of moderate size, clearly smaller than the frontal 
bristles; also with a smaller bristle just below the edge of the 
mesonotum. Abdomen narrowed apically, none of the tergites 
lengthened, without any bristly hairs above except just before 
the small, retracted hypopygium; sides of abdomen with sparse 
bristly hairs, larger on the second segment. Front tibiae bristly 
on the dorsal surface, but without any distinct linear series; 
front tarsi stout, but not conspicuously thickened. Middle tibiae 
with a dorsal hair-seam extending almost to the apex, and a 
posterodorsal series of setulae, about eight in number, each ap- 
proximately as long as the width of the tibia; a few antero- 
dorsal setulae for the basal half. Hind tibiae with complete 
dorsal hair-seam and a series about eleven postero-dorsal 
setulae, these large and stout, as long as the width of the tibia, 
except the several ones at the base which are very small and 
weak; no antero-dorsal setulae. Wings narrow, nearly three 
times as long as wide (64:23) ; costal vein long, extending be- 
yond the middle of the wing (55:100); first division nearly as 
long as the second and third together, third more than one-third 
as long as the second (30:24:9). Fringe moderately long, the 
bristles about equal to the second vein in length. Fourth vein 
feebly, evenly curved, except for a sharper bend near the base. 
Fifth vein sinuous, more distinctly bent just before the middle; 
sixth sinuous; seventh very slightly so. Third vein with a single 
bristle at the extreme base. 
Type from Puerto Bermudez, Rio Pichla, Peru, July 18-19, 
1920 (Cornell University Expedition). 
