110 
Psyche 
[September 
whitish at tip ; thin veins yellowish ; thickened spot on wing 
disk fuscous, with a small brown cloud beyond. Halteres 
black. Head short, with strongly vertical front; front one- 
fourth longer than wide, rather conspicuously hairy; four 
strong, nearly equal post-antennal bristles, the lower pair 
much below the upper ones and close together, upper pair 
separated by one-third the width of the front ; antial bristles 
but little further from the eye-margin than the lateral 
bristles of the lower row which set above them; middle 
bristles of lower row (intermedials) absent; upper frontal 
row of four about equidistant, forming a nearly straight 
line; ocellar tubercle black; post-ocellar bristles strong. 
Cheek with three strong bristles and a series of four short 
ones extending forward along the oral margin. Antennse 
small, rounded, with long, pubescent arista; palpi small 
with moderate bristles below. Mesonotum shining, but 
thickly pubescent; its lateral margins fringed with closely 
placed bristles that are much longer behind; one pair of 
strong dorsocentral macrochsetse and six bristly hairs be- 
tween them along the posterior margin; scutellum short 
and broad with two long marginal bristles. Pleurse en- 
tirely bare, but the middle coxa bears a closely placed series 
of rather long appressed bristles along its anterolateral 
edge. Abdomen above more or less shining ; second tergite 
not lengthened and its sides without bristly hairs, sixth 
tergite lengthened, as long as the third, fourth and fifth 
together ; following ones membranous, retracted in the type 
specimen, the whitish apical margins of the tergites are 
very narrow on the first to third but broader on the fourth 
to sixth segments. Middle femora slightly and hind ones 
strongly widened and flattened ; middle tibise with a row of 
about 9 strong setulse dorsally, just inside the seam and a 
second row outside the seam of about seven setulse, not ex- 
tending beyond the apical third of the tibise; hind tibise 
with two similar rows, the outer one not extending beyond 
the apical third of the tibia. Wing long and narrow, barely 
more than one-third as wide as long (4:11), with very 
short, closely placed cilia ; costa three-fifths as long as the 
wing ; first vein entering the costa somewhat nearer to the 
humeral cross-vein than to the tip, the costa slightly swollen 
