290 ERNEST E. AUSTEN—NEW AFRICAN SPECIES OF TABANUS.—PART I. 
North-Eastern Rhodesia: 26 ¢¢, 150 Q©, chiefly from Hargreaves and 
the vicinity, September, 1910. 
Tabanus pertinens, which is not especially closely allied to any of its congeners 
at present known, as regards the width and skape of the front, is not unlike 7. 
sufis, Jaenn., which also occurs on both sides of the continent. Apart from all 
other characters, however, the female of the new species may be distinguished 
from that of 7. sufis by the fact that the most conspicuous markings on the 
dorsum of its abdomen do not consist of a double longitudinal series of light- 
erey oblique spots on a slate-black ground, as well as by the absence of an 
appendix to and infuscation on the base of the anterior branch of the third 
longitudinal vein. 
According to Mr. Simpson Tabanus pertinens is troublesome to human beings, 
whom the females attack with almost the pertinacity of a Haematopota. 
