On the Bonibyliid Fauna of South Africa (Diptera). 85 



the third joint is twice as long as the two first joints together, elongate, 

 oval, obtuse at end and without style ; it is yellowish, but is blackened 

 on the apical third. Proboscis very stout, broad at base, quadrate in 

 section, straight and directed forwards, 1-5 mm. long; it is entirely 

 shining black. Palpi about as long as | of the proboscis, thin, acxite, 

 black, with rather long greyish hairs, and with scattered golden- 

 yellow, scaly hairs below them ; the pleurae are almost bare, but with 

 a tuft of long and dense whitish hair on upper part of the meso- 

 pleurae. Scutellum like the thorax, and destitute of bristles at hind 

 border; squamulae whitish, with a scanty whitish fringe; halteres 

 with whitish knob and yellowish stalk. Abdomen elongate, attenuated 

 behind ; it is shiny black, with scattered golden dust like the thorax, 

 but almost devoid of hairs ; only on the sides are some greyish ones ; 

 spines of the ovipositor reddish ; venter black, but not shining, and 

 without o-olden dust. Legs rather short, with coxae and femora 



o " 



black, tibiae and tarsi yellow ; last tarsal joint blackish ; they have 

 110 bristles, but only a scarce, pale pubescence ; hind tibiae on outer 

 side with a long but scanty fringe of hairs. Wings proportionately 

 short, whitish-hyaline, immaculate, with entire pale yellowish veins. 

 Their venation is as in Cersomyria ; 2nd vein gently curved and broadly 

 S-shaped; upper branch of cubital fork not retreating at base; 

 middle cross-vein placed on the last third of the discoidal cell. First 

 posterior cell broadened at end, but distinctly more narrow than the 

 2nd ; the 3rd posterior cell is the narrowest of all, and the 4th is the 

 broadest of all ; anal cell rather broadly open. Ambient vein com- 

 plete ; axillary lobe broad, but the alula very short, Costa bare at 

 base. 



MEG-APALPUS, Macquart (1834). 



I am attempting here to revive this genus, which was united by 

 Schiner to Corsomyza ('Novara. Dipt.,' pp. 114 and 139). The likeness 

 to this last genus is very great : the general shape of the body and 

 head is the same ; the structure of antennae is very like ; the elonga- 

 tion of palpi also, and even the shape and pubescence of the legs. 

 The wings have the same shape and neuration ; only the anal cell is 

 typically broadly open, or sometimes exceptionally closed at the wing 

 border itself. The differences are to be found in the much greater 

 nakedness of the body; in the absolute want of the circular facial 

 brush ; in the narrow genae ; in the prominent hem at the mouth 

 border and in the longer proboscis. In the male the eyes have equally 

 small areolets and are much more broadly separated, the frons being 



