290 ERNEST E. AUSTEN — NEW AFRICAN SPECIES OF TABANUS. — PART I. 



Noi-tli-Eastern Rhodesia: 26 ($ d > 150 QQ, chiefly from Hargreaves and 

 the vicinity, September, 1910. 



Tuhanus pertiaens, which is not especially closely allied to any of its congeners 

 at present known, as regards the width and shape of the front, is not unlike T. 

 siifis, Jaeun., 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 T. sujis by the fact that the most conspicuous markings on the 

 dorsum of its abdomen do not consist of a double longitudinal series of light- 

 grey 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 Tabaniis pertinens is troublesome to human beings, 

 whom the females attack with almost the pertinacity of a Haematopota. 



