36 Psyche [March- June 
half as long as the first. Basal half of first joint dark reddish- 
brown, remainder of antennae black. Labellum of face with a 
pollinia from an orchid attached to it. Thorax: dull black with 
purplish and greenish reflections, a very narrow stripe of pale 
pile along the margin some distance from the edge of the lateral 
sutures that forms anteriorly a collar of pile back of the head. A 
broad equilateral prescutellar triangle and the whole of the 
scutellum is covered with flat, long, backward-directed, thick, 
brilliant golden pile. The remainder of the mesonotum is covered 
with appressed, very dense and extremely short black pile; meta- 
no turn greenish. Abdomen: elongate, the second segment flat- 
tened, barely wider than long, with on its anterior margin a pair 
of narrowly separated, almost confluent, nearly rectangular, 
translucent spots; these spots are pale yellowish, unusually 
hyaline and each spot narrowly reaching the lateral margin in the 
middle of each side of the segment. Remainder of second segment 
and of the remaining segments wholly dull black. The abdomen, 
beyond the second segment, forms a stout, deep, cylindrical, 
bluntly-pointed, club-shaped body that is everywhere micro- 
scopically black and flat-setate. The middle of the first segment 
has a transverse band of golden appressed pile. Legs: everywhere, 
except narrowly at the base of the hind femora, black in color. 
The femora have slight greenish reflections the base of hind 
femur reddish brown. Pile of legs extremely short and pale, 
dense and appressed. Wings: with the usual spur vein, which is 
however, quite obliquely produced forward. Wing rather pointed, 
the posterior angles of the first and second posterior cells very 
much rounded. The entire anterior border of the wing dark 
brown including the costal, subcostal, marginal, submarginal 
cells, narrowly the posterior side of the third longitudinal vein, 
the whole of the first basal cell and both margins of the small 
cross vein and its connection to the fifth longitudinal vein. 
Holotype: No. 23807, one female: Jatun Yacu, Rio Naxo, 
Watershed, 700 meter, Oriente, Ecuador (Wm. C. MacIntyre). 
Mixogaster orpheus n. sp. 
Closely related to anthermus Walker but with minor differences 
in the wing venation. 
Female. 12 mm. excluding antennae; wings 12 mm. Head: 
vertex, except immediately around the ocelli, occiput, except for 
a diagonal stripe from the corner of the eyes, and front except for 
