NORTH-EASTERN RHODESIA AND THE CONGO FREE STATE. 279 



$ than in J^ ; second, third and fourth segments sometimes each with a 

 small black spot on each side ; hind borders o£ fourth and following segments 

 in $ yellowish pollinose, median blotches on sixth and seventh segments in 



? expanded into a clove-brown transverse band in each case, not reaching 

 lateral margins ; dorsum on sides of first and second and on posterior angles 

 of following segments^ also on posterior borders of fourth and following seg- 

 ments, clothed with minute, appressed, shining ochre-yellow hair, elsewhere 

 clothed with minute black hairs ; venter orange-ochraceous or ochre-yellow, 

 entirely devoid of markings, and clothed with minute, appressed, ochre- 

 yellow or buff-yellow hairs. Squamce ochraceous-buff. Halteres cream-buff. 

 Legs clothed with ochraceous-rufous or tawny hair, posterior tibiae and tarsi 

 also with minute black hairs on outer side ; tips of first and second joints of 

 front tarsi in (^, especially tip of second joint, prolonged above. 



Katanga, S.E. Congo Free State : Mid-Lualaba Valley, 3000 ft., 18.iv. to 

 3.V. 1907 {S. A. Neave). 



The nearest allies of this handsome species are clearly to be found in the 

 group of which Diatomineiira cethiopica, Thunberg (syn. Fangonia varicolor^ 

 Wied. ; P. appendicidata, Macq.), may be taken as the type ; from all the 

 members of this group at present known to me, however, Diatojiiineura virgata 

 can readily be distinguished by its conspicuouslj^ yellow-and-black-striped 

 thorax. 



Diatomineura neavei, sp. n. 



^ . — Length (1 specimen) 18 mm. ; width of head 5*5 mm. ; length of 

 proboscis 12 mm. ; length of wing 16*6 mm. 



Head, except upper part of prominent facial callus, which is shining black, 

 clay-yellow pollinose ; thorax sepia-coloured, with narrow blackish longitudinal 

 streaks on dorsum ; abdomen taicny, icith black median blotch on dorsum of 

 each of first four segments, remaining segments, except posterior angles of fifth, 

 wholly black; wings strongly tinged with sepia, costal cells and tnembrane 

 bordering longitudinal veins adjacent thereto light mummy-brown ; legs clove- 

 hrown, middle tibia', extreme base of front tibice, and front and middle tarsi, 

 except tips of joints, mummy-brown. 



$ . — Length (8 specimens) 17*75 to 19 mm. ; width of head 5*4 to 6 mm. ; 

 width of front at vertex just under 1 mm. ; length of proboscis 10'25 to 

 10*5 mm. ; length of wing 17 to 17*6 mm. 



Head, except shining black facial callus and blackish anterior extremity of 

 face, clay-yellow pollinose ; dorsum of thorax and of first segment of abdomen 

 clay-brown, thorax (in specimens in good condition) icith a brighter (clay-yelloic), 

 broad, median, longitudinal stripe ; dorsum of second and following segments of 

 abdomen shining clove-brown, greyish pollinose on hind borders, which, excep)t 

 edian portions of those of terminal and penidtimate segments, are clothed ivith 



m 



