1947] 
Hull — Syrphid Flies 
237 
nose and with long sparse yellowish white pile. The 
scutellum is black with only a few, long, tine black hairs ; 
the ventral fringe consists of seven or eight pairs of mod- 
erately long black hairs. There is an anterior mesonotal 
collar of pale yellow hairs. The squamae are light brown, 
the halteres pale brown with reddish knob. Abdomen: 
petiolate, shining black, the first segment with slight 
bluish reflections, its sides with thick long yellowish white 
pile and some black hairs both dorsally and anteriorly. 
The second segment is a little bluish along the sides and 
narrowly along the apical margin. There is a prominent, 
subapical, opaque black annulus which is prolonged and 
produced forward in the middle to within a short distance 
of the base. The second segment is slightly over three 
times as long as its least width. The third segment is 
considerably wider, especially at the apex and with a pair 
of obscure, opaque black triangles on either side and 
medial opaque stripe. The fourth segment is similar, the 
opaque areas less distinct. On both the third and fourth 
segments the opaque areas are only visible from an ob- 
lique posterior or anterior view. The fifth segment is 
wholly shining black; the pile of the abdomen is black 
beyond the first segment except for a very few white hairs 
on the sides of the second segment near the base. Legs: 
the anterior and middle femora and tibiae are brownish 
black; their apices and bases of the tibiae are narrowly 
reddish brown. The anterior and middle tarsi are dark 
brown ; the hind femora, except the narrow base and apex 
and the hind tibiae except the extreme base, are black, both 
with black pile. The basal tliree-fourths of the hind 
basitarsi are black and black pilose; remainder of these 
tarsi with nearly similarly colored pile. Wings: sepia 
brown throughout except upon the apical fifth ; the brown 
color fills the discal cell. The alulae are wide and well- 
developed; there is an abnormality in the second longi- 
tudinal vein near the end of the marginal cell in both 
wings; it consists of a spur directed obliquely outward 
cutting half way across the submarginal cell. 
Holotype: a male, Villa Rica, Paraguay, Nov. 1938 col- 
lected by F. Schade; one paratype male, Dec. 1936 but 
