280, ERNEST E. AUSTEN—NEW AFRICAN 
a narrow, ochraceous”, lateral edging to anterior two-thirds of second segment, 
uniformly shining black and clothed with black hairs; hind margins of ventral 
scutes of second to sixth segments inclusive whitish grey, and clothed with 
silvery-white hairs. Wings hyaline, strongly marked with clove-brown or 
blackish brown, as shown in fig. 1, except that (at least in the case of the three 
specimens available for examination) the clear spaces in the first and second 
basal cells are a little smaller than would be supposed from the figure; trans- 
verse band, which covers discal cell, extending right across wing, as in 7’, 
africanus (not abbreviated before reaching hind margin as in 7’, latipes), distal 
margin of band less irregular than in wing of 7’, africanus ; tip of wing as in 
1. latipes, i.e. merely with a grey border composed of minute hairs, the tips of 
the second longitudinal and anterior branch of the third longitudinal veins not, 
as in J. africanus, suffused with dark brown.  Squamae and halteres as in 
1’. latipes, though base of knobs and distal extremity of stalks of halteres some- 
times dark brown. 
NorTHERN NiGeEriA and SiERRA LEONE PROTECTORATE: type from 
Amageddi, R. Benue, Bassa Province, Northern Nigeria, 23. ix. 1909, and a 
second example from South Bornu, Northern Nigeria, between September and 
December, 1908 (Dr. [7/. A. Foy, W.A.MLS.); a third specimen from the vicinity 
of Wankefu, Karene District, Sierra Leone Protectorate, December, 1909 
(Dr. J. C. Murphy, W.A.M.S.). 
As will have been gathered from the above description, Tabanus necopinus 
occupies an intermediate position between 7, africanus, Gray, and 7’, latipes, 
Macq. (that it is not, however, a mere variety or form of either of these species 
is proved by, inter alia, the difference in the shape of the third joint of the 
antennae). ‘These three handsome, tawny-ochraceous species constitute a well- 
defined group, the members of which, owing to the characteristic pattern of their 
wing-markings, cannot be confused with any other of their congeners at present 
known. In tabular form their mutually distinctive characters may be indicated 
as follows :— 
1. Ventral surface of abdomen (except its basal angles 
and the hind margins of the second to the sixth 
segments inclusive) entirely black 599 we necopinus, Austen, 
Ventral surface of abdomen not entirely black ... 2. 
2. Transverse band on wing reaching hind margin ; 
tips of second longitudinal and of anterior branch 
of third longitudinal vein infuscated with dark 
brown ae oP ube 3 sob ws africanus, Gray. 
Transverse band on wing not reaching hind margin ; 
tips of veins mentioned not infuscated with dark 
brown she ee aa ee “Be 
... latipes, Macq. 
* For names and illustrations of colours, see Ridgeway, “A Nomenclature of Colors for 
Naturalists” (Boston: Little, Brown and Company, 1886). 
