Genus Pecomyia. 265 



the apex of the wing, its stein not quite as long as the cell ; stem 

 of the second posterior about as long as the cell ; posterior cross- 

 vein about one and a third its own length distant from the mid. 



Length. — 3 mm. 



Time of capture. — March. 



Habitat. — Sierra Leone (Major F. Smith, R.A.M.C.). 



Observations. — Described from several males bred by Major 

 F. Smith, R.A.M.C., from larvae taken in Nichol Brook, Mount 

 Aureol, Sierra Leone. The male genitalia are very peculiar. 

 The white scaled scutellum places it, as far as general appearance 

 goes, near R. niveoscutella, but the marked bands on the femora 

 and tibiae and male genitalia at once separate it. 



Genus PECOMYIA. Theobald. 

 Journ. Econ. Biol. Vol. I., No. 1, p. 24 (1905). 



Head clothed with narrow-curved scales, upright forked 

 scales and flat lateral ones ; palpi in female short, long in the 

 male, two apical segments slightly swollen, but acuminate. 

 Thorax with narrow-curved scales ; scutellum with narrow- 

 curved and small flat scales mixed together on the mid lobe ; 

 narrow, rather long flat scales and a few narrow-curved ones to 

 the lateral lobes ; metanotum nude. Wings with mottled scales ; 

 the median vein-scales large, bluntly Taeniorhynchus-sh&pe, black 

 and grey in patches, the lateral vein-scales linear, but straight 

 and stiff, arising in definite order on each side of most of the 

 veins, like the teeth of a comb ; the lateral vein scales of the 

 branches of the second long vein denser and broader than 

 the rest. 



The male genitalia with the claspers, with a large inflated 

 basal and sickle-shaped posterior lobe, no lateral segment. Hind 

 ungues of male unequal but simple. 



This genus resembles in general appearance Grabltamia, but 

 can at once be told by the scutellar ornamentation, and the 

 straight stiff lateral vein-scales and the distinct male genitalia. 



It is a Culicine, and comes between Beedomyia and GrabJiamia. 



The presence of unequal hind ungues in the male is unique. 



