African Pldehotumic Diptera. 299 



divided into two spots ; hind margin with more or less 

 distinct liglit blotches in distal marginal angles of second, 

 third, and fifth posterior cells, and sometimes with additional 

 light blotches in proximal marginal angle of fifth posterior 

 cell and elsewhere ; light blotch on sixth longitudinal vein 

 beyond zigzag mark obsolete or very small and indistinct; 

 in axillary cell zigzag mark and basal light loop not con- 

 nected ; light markings in basal cells of normal type ; discal 

 cell with two transverse light marks across middle third and. 

 a third light fleck (sometimes very small) near distal extre- 

 mity ; stigma of moderate length, pale mnmmy-brown, its 

 proximal extremity tawny olive, but no distinct light mark 

 running up from proximal rosette to costa ; marginal cell 

 with a well-defined oval light loop at distal end of stigma. 

 Halteres : knob seal-brown, outer margin cream-bufl', stalk 

 cream-coloured. Legs: neither front nor hind, tibise in- 

 crassate ; front tarsi, tips of front tibise and of joints of 

 middle and hind tarsi mummy-brown, basal two-thirds of 

 first joint of middle and hind tarsi tawny olive. 



Angola : type and one other specimen from the vicinity of 

 the Keve River, Benguella, November-December 1904 

 [received from Dr. F. Creighton JVel/man). 



H(smatopota hostilis must not be confused with H. brevi- 

 cornis, Austen, the typical series of which was also obtained 

 by Dr. Creighton Wellman in Benguella, and to which it 

 presents some slight resemblance ; the new species may be 

 distinguished, inter alia, by the longer and more slender 

 antennie, the absence of spots on the abdomen, and the much 

 greater fineness of the wing-markings, which are also more 

 restricted in extent. 



Hamatopota tenuicrus, sp. n. 



$ . — Length (1 specimen) 7'5 mm. ; width of head just 

 over 2 mm. ; width of front at vertex 0*8 mm. ; length of 

 wing 7 mm. 



Mummy -broivn, abdomen dark brown; on dorsum of thorax 

 the sides and three conspicuous parallel longitudinal stripes 

 yelloivish grey ; dorsum of abdomen ivith hind margin and sides 

 of each segment yelloivish pollinose ; ivings sepia, light 

 markings distinct and rather fine, usucd three rosettes present :, 

 a broad dull light curved transverse streak close to tip of wing 

 beyond apical sinuous mark, and a series of large dull light 

 blotches on hind margin [in distal marginal angles of all poste- 

 rior cells and at distal extremity of axillary cell) ; legs light 

 mummy -brown^ tibia ivithoid bands and not incrassate. 



Head : front light mummy-brown, with usual darker 



