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on each side on lower half; with a more or less greenish reflection. Pile of 

 front and middle of face rather longish, black, on lower part of face, its 

 sides and lower half of the occiput, yellowish. Antennae black; first segment 

 equal in length to the two following together; third segment elongate, oval, 

 not quite three times as long as broad, its end narrowed and evenly rounded. 



Dorsum of thorax, scutellum and uppei part of the pleurae deep metallic 

 blue, the dorsum with four purplish lines; lower part of pleurae and pectus 

 piceous yellowish, postalar calli piceous, Pile moderately long, black, in- 

 cluding that on the mesopleurae. Scutellum almost plain above, the edge 

 strongly convex, the apex moderately subtriangularly excavated, at each 

 side with a short, stout spine. 



Legs black, the femora on the apical lower half below, and basai half of 

 the tibiae yellow. Apical segments of the anterior four tarsi brownish. Pile 

 black, moderately long, on the hind tarsi yellowish. Tarsi with yellowish 

 cushions. 



Wings brown, the apical and posterior portions paler. Last section of 

 fourth vein a little récurrent, joining the third longitudinal opposite the 

 tip of the second vein. Last section of fifth vein strongly récurrent, but 

 its tip directed forward so it joins the fourth vein at a right angle. 



Squamae whitish yellow, with a yellow fringe. Haltères yellow. 



Abdomen deep metallic blue, with a purplish reflection. Third segment 

 a little longer in the middle than the second, fourth almost twice as long 

 as the third, fifth two-thirds as long as the fourth. Pile black or brown, 

 short; on the apices of each segment, more broadly on the terminal ones, 

 pale yellowish. Venter purplish. 



Holotype, Ç, (N° 5159, Welcome Tropical Research Laboratory, 

 Khartoum) Sudan, April 29, 1909, (H. H. King), in the British 

 Muséum of Natural History. 



Superficially this species is remarkably like M. brevicornis Loew, 

 but it is at once distinguished by the first antennal joint being longer 

 than the third; the stump of vein in the apical cell arises about the 

 middle of the cell and not well before the middle and the tibiae are 

 black pilose on the outer surface, almost or quite to the base and not 

 white pilose on the basai half. 



