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A NEW SPECIES OF HIPPOBOSOA FROM NORTHERN 



RHODESIA. 



By Ernest E. Austen. 

 (Published by permission of the Trustees of the British Museum.) 



Hippobosca fulva, sp. n. 



Q. — Length (1 specimen) 3*5 mm. ; width of head 1*4 mm. ; width of front 

 at vertex 0*6 mm. ; length of wing 5 mm. 



Extremely small species : thorax {exclusive of scutellum) and abdomen deep tawny, 

 thorax entirely devoid of markings ; scutellum, except hind border, pale straw- 

 yellow, with four relatively stout, ochraceous bristles on hind border on each side oj 

 middle line ; icings nearly hyaline, faintly tinged with drab-grey but not at all 

 infuscated, veins ochraceous ; legs ochraceous or tawny ochraceous, without bands or 

 other dark markings, except that extreme tips of femora are narrowly edged ivith 

 dark brown, at least above. 



Head : triangular plate on vertex wax-yellow ; sides of front ochraceous, 

 anterior border of front raw-sienna-coloured, narrow ; frontal stripe cinnamon- 

 rufous ; face yellowish-white, its lower edges fringed with black hairs, under 

 surface of head clothed with Naples-yellow or pale yellowish hair ; palpi dark 

 brown ; antennae tawny ochraceous. Thorax : short bristles or spines in front 

 of base of each wing three in number, black, and arranged in a transverse row, 

 longer hair or bristles on dorsum sparse and yellowish in colour ; fine hair on 

 pleurae and pectus pale yellowish ; hind border of scutellum ochraceous or tawny 

 ochraceous. Abdomen clothed with pale yellowish hair. Wings : costa (at least 

 in typical example) dipping below first longitudinal vein between a point 

 approximately on a level with commencement of distal fourth of first basal cell 

 and end of first longitudinal vein ; costa, except at base, bearing a single row of 

 short bristles, arranged at more or less regular intervals ; third longitudinal vein 

 straight and much closer to second longitudinal vein and costa than in case of 

 H. capensis, v. Olf ., so that the submarginal cell is conspicuously narrower than in 

 the species mentioned ; neither anterior transverse vein nor adjacent portions of 

 veins infuscated. Halteres ochraceous. Legs : front coxae, except at base, pale 

 straw-yellow ; hair and bristles for most part agreeing with ground-colour, two 

 or three long bristles at tips of hind femora above, and short bristles at distal 

 extremities of hind tibiae dark brown. 



Northern (North-Eastern) Rhodesia : Nawalia, 21.ix,1911, on haarte- 

 beeste {Alcelaphus lichtensteini, Peters) {LI. Lloyd : presented to the British 

 Museum by the Entomological Research Committee). 



The species described above cannot possibly be confused with any of its 

 congeners previously known, and its discoverer is to be congratulated on having 

 made so interesting an addition to the extremely limited number of recognised 

 species of Hippobosca. 



