344 Dr. C. P. Alexander on 
before its outer end ; cell 1st M, open by the atrophy of m; 
basal deflection of Cu, a short distance before the fork of M, 
this distance usually a little less than the length of the 
deflection of Cu, alone. 
Abdomen dark brown. Male hypopygium with the 
pleurites rather stout, broad at the base, the inner face set 
with abundant erect spinous setz ; two pleural appendages, 
the outer appendage short, heavily chitinized, the tip in- 
distinctly bifid; inner appendage long, broad at the base, 
suddenly narrowed to the slender curved tip, which bears 
a single long bristle at its apex; along the cephalic or 
prone) margin of this appendage at about mid-length 
a group of about seven stout erect setz. Gonapophyses 
appearing as flattened blades whose posterior lateral angle 
is produced into a long acute point; penis-guard curved 
at the tip. 
Hab. West Africa. 
Holotype, 8, Wonji, about 50 miles north of Kribi, 
near the Ulou River, altitude about 1000 feet, July 18, 
1919 (J. A. Reis). 
Paratopotype, 3. 
RHAMPHIDIOIDES, subgen. nov. 
Rostrum nearly as long as the head. Antenne with 
16 segments, the scapal segments enlarged; flagellar seg- 
ments slender, with appressed verticils. Legs long and 
‘slender; claws simple. Wings with vein Se long, ending 
nearly opposite the fork of the long sector, Sc, far before 
the tip of Sr;; Sc, and R, close together at the wing- 
margin, the space on costa between them about equal to the 
basal deflection of Cu,; r lacking; veins R.,; and Ry,5 
strongly divergent at their outer ends, cell R; being very 
broadly trumpet-shaped outwardly ; cell lst M, closed ; 
basal deflection of Cu, far before the fork of M. Male 
hypopygium with the pleurites long and slender; two 
pleural appendages. Ovipositor with the valves very long 
and slender, the tergal valves especially so. 
Type of the subgenus.—Rhamphidia (Rhamphidioides) 
venustissima, sp. n. (Cameroun). 
The habitus of this beautiful little fly is quite unlike 
typical Rhamphidia, and it is probable that the similarity 
that seems to exist between the two groups will be found to 
be superficial only when more material is obtained. The 
legs are long and slender ; the wings with Se very long and 
close to R, at the wing-margin and with Sc, far back from 
