162 Dr. C. P. Alexander on 



Dicranomyia venustula, sp. n. 



General coloration light yellow; anteniise yellow, the first 

 scapal segment dark brown ; legs yellow, the tips of the 

 femora and tibiae narrowly infuscated ; wings light yellow, 

 spotted with brown ; Sc short, Rs square at origin. 



Male. — Length 4<'4-5 mm. ; wing 4'6-5 mm. 



Female. — Length 5*5 mm. ; wing 6 mm. 



Rostrum and palpi dark brown. Antennse light yellow, 

 the first scapal segment dark brown ; in the male, the 

 flagellar segments are short-petiolate basally and are pro- 

 vided with long vei'ticils. Head dark brown, indistinctly 

 pruinose. 



Mesonotum and pleura pale whitish yellow, unmarked. 

 Halteres yellow. Legs yellow, the tips of the femora 

 narrowly dark brown, of the tibise still more narrowly dark 

 brown ; terminal tarsal segments infuscated. Wings with a 

 faint yellowish tinge, sparsely variegated with brown spots, 

 arranged as follows: At tip of Sc and origin of Rs ; at 

 stigma; seams along the cord and outer end of cell 1^^ Mg ; 

 spots at the ends of veins i?2+3? -^1+2? ^3> ^^u ^"2' ^"^^ *^^^ 

 anal veins, the two latter the largest ; veins yellow, brown 

 in the infuscated areas. Venation : Sc short, Sci ending 

 immediately beyond the origin of Rs, Sc2 at tip ; Rs sqnare 

 at origin or with the angle of curvature proximad of the 

 actual origin, sometimes spurred ; inner ends of cells R^ and 

 1st M2 lying far proximad of cell JR^; cell Ist M2 closed, 

 shorter than vein M^^^^ beyond it but longer than M^; basal 

 deflection of Cmj at or immediately before the fork of M ; 

 Oil 2 shorter than the basal deflection of Cmj. 



Abdomen yellow, the apices of tergites narrowly infus- 

 cated, broadest medially. Male hypopygium with the pleural 

 appendage elongate and slender, cylindrical, directed 

 proximad and decussate with its mate across the genital 

 chamber. Ovipositor with the sternal valves blackened at 

 base. 



Hab. Cameroun. 



Holotype, ^ , Elat, 1920 [J. A. Reis). 



Allotopotype, ? . 



Paratopotypes. 3 ^ 's. 



D. venustula is most closely related to the larger D. ivoos- 

 nami, Alexander (East Africa). 



