120 
Psyche 
[December 
agant way, reminding one of Platychirus. See the generic 
description for further details. 
Length 18 mm. 
One male. Efufup, Kamerun, W. Africa, August 30, 
1919. Carnegie Museum. Accession No. 6552. Holotype 
male in Carnegie Museum. 
This fly is to the Syrphidae what Calotarsa is to the Platy- 
pezidae, a curious convergent type of structural develop- 
ment. 
Syrphipogon new genus 
Very large flies related to Microdon. 
Eyes bare, broadly dichoptic in male. Antennae slender, 
the first joint sub-equal to last two. Arista thick, its surface 
pubescent. Hair of upper front directed upward, of vertex 
directed forward and upward so that the two converge above 
ocelli. Lower face just above mid oral margin equipped with 
a beard of long thick shining black bristles. 
Thorax normal, thick black bristly, greatly appressed. 
Scutellum with a pair of enormous spines, deeply sulcate 
between, directed upward and posteriorward at an angle of 
45 degrees. Abdomen broad and thick, the lateral posterior 
margins of the third segment and adjoining base of the 
fourth deeply sunken, followed by a simple situation on the 
next segment so that a strong ridge lies between. Hind basi- 
tarsi longer than remaining joints, greatly widened and 
flattened. Remaining joints similarly widened and flattened, 
but less so. 
Last section of fourth longitudinal vein (subapical cross 
vein) bluntly angulate outward, just before terminus the 
posterior angles of the first posterior and discal cells not 
angulate but evenly rounded. No spurs except for the poste- 
rior cell spur cutting down to terminys of spurious vein. 
Wings black basally, blackish on a narrow distal apex, and 
yellow with yellow veins between. 
Genotype : Syrphipogon fucatissimus new species. 
Syrphipogon fucatissimus new species 
Male. Whole face and head shining black, the face with a 
faint purplish tinge. Arista pale yellow. Antennae black, 
