African PMehotomic D'lptera. 297 



longitudinal vein, portion of apical mark between second 

 longitudinal and upper branch of third longitudinal vein 

 further from apex of wing than lower portion ; usual series 

 of oblique marks across posterior cells small and incon- 

 spicuous, sometimes more or less broken up into spots ; faint 

 ti-aces of light blotches sometimes visible on hind margin, 

 in marginal angles of certain posterior cells ; light blotch on 

 sixth longitudinal vein beyond zigzag mark usually large and 

 conspicuous ; light loop at base of axillary cell and zigzag' 

 mark connected along sixth longitudinal vein by a broad light 

 bar, proximal extremity of Avhich extends across anal cell to 

 fifth longitudinal vein ; discal cell with a coarse curved light 

 mark at proximal and two transverse light marks (sometimes 

 joined into a roughly shaped ring) at distal extremity ; 

 costal cells pale ochraceous buff; st'tgrna mummy-brown, of 

 moderate length, its proximal extremity ochraceous buff; 

 marginal cell beyond stigma with a well-marked light loop, 

 in addition to which there is a transverse light mark near 

 distal e^drem'ity of mar (/inal cell; alula with a dark centre 

 surrounded by a pale border. Halteres cream-buff or cream- 

 coloured, knob sometimes brownish at base above and below. 

 Legs : tibife not incrassate ; tarsi dark brown towards tips, 

 first joint of middle and hind tarsi except tip ci'cam-buflP. 



Angola: type and two other sj)ecimens from Benguella, 

 ISovember-December 1904, "four specimens in thin bush ^' 

 [Dr. F. Creighton Welhnan). 



This well-marked species is readily distinguishable by its 

 wing-markings from any of its congeners at present known 

 to me ; the narrow tapering abdomen, with the conspicuous 

 dark brown blotches on the dorsum, also serves to give the 

 species a distinctive character. 



Hcematopota hostilis, sp, n. 



? . — Length (2 specimens) 8-3 mm. ; width of head 2-5 to 

 2"6 mm. ; widih of front at vertex 1 mm. to just over 1 mm. ; 

 length of wing 825 mm. 



Basal 2^ortion of third joint of antennm ochraceous rufous ; 

 dorsum of thorax olive, usual three longitudinal stripes 

 yellowish grey, indistinct; dorsum of abdomen yellowish grey, 

 ivithout distinct spots, hind margins of segnunts paler, second 

 and following segments each ivith an olive-broivn area in 

 middle, which, e.vcept in case of last segment, is more or less 

 distinctly divided by a yellowish grey median longitudinal 

 stripe ; wings pale sepia, light markings of no7'mal type and 

 clearly defined; legs cinnamon, front tibice sometimes with a 

 faint indication of a pule band on basal third, middle and hind 



