MICRODOX. 131 



first t\vo joints, which are almost baiv, with very short black 

 pubescence ; third joint cylindrical, a little longer than the first, 

 with a reddish and rather short arista, which is not thickened ; 

 second joint half as long as the first. Thorax and scutellum 

 entirely black, and dull owing to being densely and coarsely punctate ; 

 the thorax is bare or has only a hardly visible black pubescence, 

 while only the upper .side of the sternopleura is whitish pollinose ; 

 inetanotum shining black; hind part of ineso-, ptero-, and mcta pleura 

 smooth, not punctate, dull, with some faint furrows. Scutellum 

 semicircular, rather small, like the thorax, with trace of a middle 

 longitudinal furrow. Abdomen conical, broader than the thorax at 

 the base and similarly punctate, dull, bare, with very short black 

 pubescence ; fourth segment one and a half times as long as the 

 third, fifth half as long as the fourth, reddish on the hind border 



Fig. 23. Microdon crythrocephalvs, sp. n., $. X 3. 



towards the middle ; third, fourth, and fifth segment with two 

 oblique stripes of white dust on each side, the outer being more 

 distinct. Belly black ; ovipositor reddish. Legs bare, with short 

 yellowish pubescence on the tibiae, entirely red, except coxae and 

 hind trochanters, which are black, and front and hind tarsi, which 

 are somewhat infuscated ; first joint of hind tarsi not swollen. 

 Wings broad, blackish, with purplish reflexions, but with grey 

 patches towards the middle of the cells of the posterior half, only 

 black borders to the veins being sometimes present ; subapical cross- 

 vein strongly recurrent ; stump on the third vein very long , sub- 

 apical and discal cells with very much rounded lower outer cornel's, 

 each of which is sometimes provided with a short stump. 



Type $ i from Kasai near Kampala, Uganda, 30. viii. 1911 

 (#. A. Neavc) ; another specimen from Western Ankole, Uganda. 

 4,500-5, 000 ft., " open short grass country, with some bush," 

 10-11. x. 1911 (same collector}. 



