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MICRODON TARSALIS Hervé-Bazin. 



One d*, Kasindi to Béni, Belgian Congo, 29 30' E., o° 30' N., 

 August, 1914 (Dr. J. Bequaert). The type spécimen, from Belgian 

 Congo, had the third antennal joint missing : The first two antennal 

 joints are brownish yellow, the third black, with a whitish sheen, the 

 first joint exactly as long as the two following together, the third a 

 little over three-fifths as long as the first, not quite as wide as the 

 second, with almost parallel sides but a little broadened on its apical 

 third, thence gradually narrowed, the end obtuse, the narrowing due 

 to the slope of the lower edge, giving the end a very slight upward 

 curve. The arista is luteous, slightly longer than the third jcint, very 

 slender, its basai sixth conspicuously large, narrowly sub-conical. 

 The tufts of short, black, spinulose pile about the base of the wing 

 is a rather distinctive character. 



Figure 1. — A. Microdon sudanus n. sp. profile of head. 

 B. Microdon tarsalis H-B.. profile of head. 



MICRODON SUDANUS, new species. 



This species falls into Group III in Bezzi's table of groups and 

 gênera, but must be separated from this group because of the appro- 

 ximate ocelli, which are equidistant from each other. The fly is 

 strongly metallic deep blue with purplish reflections in some lights; 

 the scutellum subtriangularly excavated and bearing spines. 



Length 10 mm. Female. Eyes bare. Face narrower than the width of one 

 eye, its sides and those of the front almost parallel, the front scarcely nar- 

 rowed at the vertex. Face deep blue, with a purplish reflection, but convex, 

 more so above, below receding to the oral margin. Front with a dépression 



