344 Dr. C. P. Alexander on 



before its outer end ; cell \st A/o open l)y the atro|)liy of m ; 

 l)asiil deflection of (hi^ a short distance before the fork of 3/, 

 this distance nsnaliy a little less than the length of the 

 dctloction of Citi alone. 



Abdomen dark brown. Male hypopygium witli the 

 plenrites rather stout, broad at the base, the inner face set 

 with abundant erect spinous setse ; 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, wiiich bears 

 a single long bristle at its apex ; along the cej)halic or 

 proximal margin of this appendage at about mid-length 

 a group of about seven stout erect setre. (jona[)ophys(*s 

 appearing as flattened blades whose posterior lateral angle 

 is produced into a long acute point ; penis-guard curved 

 at the tip. 



Hub. West Africa. 



Ho/oti/pe, (^ , Lonji, about 50 miles north of Kribi, 

 near the Ulou River, altitude about 1000 feet, July 18, 

 1919 (J. A. Reis). 



I'aratopotype, S • 



Rhampiiidioides, subgen. nov. 



Rostrum nearly as long as the head. Antenna; with 

 16 segments, the scapal segments enlarged ; flagellar seg- 

 ments slender, with apprcssrd verticils. Legs long and 

 s1cn<lcr; claws siinplr. AVings with vein Sc long, ending 

 nearly oppv>site the fork of the long sector, Sc» I'ar bd'ore 

 the tip of *Sr, ; ,S'Ci and /n\ close together at the wing- 

 niargiu, the space on costa between them about equal to tlie 

 basal deflection of Ciii', r lacking; veins /^o+s ^''d /?4_^5 

 strongly divergent at their outer ends, cell R^ being very 

 broadly trumpet-shaped outwardly ; cell \st M^ closed ; 

 basal deflection of Cui far before the fork of M. ]Male 

 hypopygium with the plenrites long and slender; two 

 pleural appendages. Ovipositor with the valves very long 

 and slender, the tergal valves especially so. 



Type of the sul)<>enns. — Rhumphidia {Rhnmphidiohlcs) 

 vernistissima, sp. n. (Cameroun). 



The habitus of this beautiful little fly is quite unlike 

 typical R/i(u/ip/iidia, and it is probable that the siniilaiit}' 

 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 Sc very long and 

 close to />'| at the wing-margin and \\ ith -S'^., far l)aek from 



