140 E. E. AUSTEN. 



Among other species referable to the new genus thus briefly characterised are 

 Pangonia hrunnijpennis, Lw., P. suhfascia, Walk., Corizoneura albifacies, Ric... 

 C. dissimilis, Ric, and the new species described below. 



The geftus Corizoneura, Rond., as defined and restricted above, includes, in 

 addition to the genotype and the new species described in this paper : — ■Diatomineura 

 virgata, Austen ; D. inornata, Austen ; D. neavei, Austen ; Pangonia sagittaria, Sure; 

 Corizoneura distincta, Ric. ; Pangofiia lateralis, Wied. (Fabr. ?) ; Diatomineura 

 liastata, Austen ; D. lineatithorax, Austen ; D. penetrabilis, Austen ; Corizoneura 

 2)allidipennis, Ric. ; and C. umbratipennis, Ric. The foregoing all belong to the 

 Ethiopian Region, and congeneric with them are the Oriental Pangonia tajorobanes, 

 Walk. (syn. P. rufa, Macq.), and P. longirostris, Hardw. 



Another change which may as well be made now, since in any case it is almost 

 certain to be effected sooner or later, is the replacement of Macquart's generic 

 designation Cadicera by Phara, Walk. (Ins. Saund., Diptera, Part i, p. 9, 1850). 

 The latter name, accompanied by a brief diagnosis, was applied by its author to one of 

 " several groups or subgenera " of Pangonia, Latr. ; eighteen species were mentioned 

 under Phara, the first three of these being, in the order given, Pangonia melanojpyga, 

 Wied., P. cJirysostigma, Wied., and P. crassipalpis, Macq. The present writer hereby 

 proposes to regard Pangonia melanojpyga, Wied., as the genotype of Phara, Walk. ; 

 to raise the latter to generic rank ; and to restrict it so as to include besides the 

 genotype, among the species mentioned under Phara by Walker, only Pangonia 

 chrysostigma, Wied., and P. crassipalpis, Macq., since these three species are 

 obviously congeneric. Phara, Walk., therefore, as thus restricted, replaces and 

 must be substituted for Cadicera, Macq. (Mem. Soc. Imp. des Sc. Lille, 1854, (2) 

 p. 42, 1855), founded for C. rubramarginata, Macq. {loc. cit, p. 23). 



Except where otherwise stated, the types of the new species described in the 

 following pages are in the British Museum (Natural History). 



Genus Buplex, nov. 

 Buplex fuscinervis, sp. n. 



5. — Length (2 specimens) 12 to 13 mm. ; width of head 4 to 4'2 mm. ; width of 

 front at vertex 0*8 mm. ; length of proboscis 3*4 to 3'5 mm. ; length of wing 12*4 to 

 12'5 mm. 



Body, except certain areas at sides of abdomen, black above, with scutellum, lateral 

 borders and three narrow longitudinal stripes on scutum, and deep posterior borders to 

 abdominal segments smoke-grey* or pale smoke-grey pollinose ; lateral extremities of 

 tergites of first {visible) and second abdominal segments smoke-grey, more or less tinged 

 with ochraceoiis tawny owing to the subjacent ground-colour ; wings with base, costal 

 and sub-costal cells and stigmatic area ochreous, veins after first longitudinal in distal half 

 (from base of discal cell onwards) dark brown, and for most part more or less strongly 

 suffused with mummy brown. 



*For names and illustrations of colours used for descriptive purposes in the present 

 paper, see Ridgway, *' Color Standards and Color Nomenclature " (Washington, D.C. 

 Published by the Author, 1912). 



