340 Dr. C. P. Alexander on 



pale browu; tarsi pale brown, only tlie terminal two or 

 three segments darker browu and somewhat inflated ; claws 

 long and slender, with a very long, erect basal tootii and 

 a shorter ap|)ressed tooth beyond mid-length. Wings with 

 the cephalic half hyaline, the caudal cells strongly suffused 

 with browuish grey, the membrane with a heavy dark brown 

 pattern including six costal blotches ; costiil cell largely 

 darkcncvl ; cell Sc largely pale, traversed by the first, third, 

 and fouith brown blotches ; the first of these areas occupies 

 the arculus ; the third at the origin of Es, almost reaching 

 vein M; the fourth, largest, occupies the end of vein Sc 

 and passes through cell 1st Ri to l)eyond the fork of the 

 sector ; the fiftli blotch occupies the end of vein R^ and r, 

 and attains vein Ri^^; the last blotch occupies the ends of 

 cells 2nd Ri and B3 ; slightly paler but broad seams along 

 the cord and outer end of cell 1st Mo and as scams along 

 veins R4+6, ^J, and Cu ; dark clouds at the ends of veins 

 Cu^, Cu2, 1st A and 2nc? A, and in the anal angle of the 

 ■wing; veins dark brown. Venation : Sc very long, Sc2 

 ending just before the fork of Rs, S^Co at the extreme tip of 

 Sci, and exceeding it in length ; Rs long, strongly arcuatcil 

 at origin ; ?' retreated back from the tip of R^, so that Ri 

 beyond r is about half again as long as ;• ; cell 1st il/. closed ; 

 basal deflection of C?/i before the fork of il/. 



Abdomen dark brown. Male hypopyginm rather large 

 and comj-licatt'd in structure for this genus of flies. Ovi- 

 positor A\ith the valves short, the tergal valves slender, 

 strongly iipcurved ; sternal valves transversely flattened and 

 connected with one another by a membrane. 



UaO. West Africa. 



Hulotype, ^, Lonji, about 50 miles north of Kribi, near 

 the Ulou ]{iver, Cameroun, altitude about 1(00 feet, 

 July 17, J 919 {J. A. Reis). 



Allotopotype, ? . 



This handsome fly is undoubtedly related to V. recurvans, 

 Alex. (Los Islands), but is readily told by the wing-pattern 

 and vcnational details. The two species foi'm a distimt 

 group of the genus, in which 7* is at some distance from 

 the tip of /ij, and the female ovipositor shows a jicculiar 

 specialized structure. The recently described D. irigouia 

 (I'ld wards) of Sumatra (Jouin. Fed. I\Ialay States Mus. 

 vol. viii. pt. 3, p[i. 1;"), 10 ; July 1919) is evidently another 

 member of this peculiar group. 



