1947] 
Hull — Syrphid Flies 
239 
fourth segments show some indication of running nar- 
rowly and obscurely to the base of the segment ; the baso- 
lateral areas of the segments are, however, shining 
brownish black; fifth segment shining black. The pile 
along the sides of the second abdominal segment is very 
sparse and short but a little longer on the posterior half ; 
the pile on the sides of the first segment is sparse and 
moderately long in the corners and brownish black. 
Legs: anterior pair light brownish yellow with pale pile; 
medial pair light brown, the lateral fringe of the middle 
femora moderately long and reddish brown. The hind 
femora are pale reddish brown with wide, obscure, darker 
brown subapical bands. The hind tibiae are slender, pre- 
apically compressed, straight and reddish brown with, in 
the middle, a brownish yellow band. The hind basitarsi 
are slender and entirely brown with dark brown pile on 
the dorsal surface and brownish yellow pile below; last 
segments missing. The pile of the hind tibiae and femora 
is brownish black. Wings: slender, and light brown in- 
cluding the costal cell; stigmal cell dark brown, lighter 
below the costal cell; the third vein is arched and con- 
siderably drawn down apically; alulae quite absent; anal 
lobe almost hyaline. 
Holotype: a male, Mt. Duida, Venezuela, Dec. 1, 1928. 
Accession 25500, 423 ; Tate. In the American Museum of 
Natural History. 
Rhinoprosopa sycorax n. sp. 
A yellow and brown species with pale yellowish wings. 
Related to lucifer Hull. Length about 9 mm. 
Female. Head: the vertex is brassy black, the ocelli 
set off by a crease touching their margins ; the vertical 
pile is short and black. The front is brownish black in 
the middle with the sides ochraceous yellow and in the 
midline there is a brassy, linear stripe wider on the upper 
half ; the face is reddish sepia in the middle with a very 
low pinched tubercle ; the sides of the face and cheeks are 
light yellow. The face is triangularly produced forward 
as is characteristic of the genus but not as much as in 
cenea Hull. The antennae are slightly elongate and red- 
dish orange; the dorsal surface of the third segment is 
