117 



National d'Histoire Naturelle, Paris, and were taken at Voi, in 

 the East Africa Protectorate, in 1906, by M . Maurice de Rothschild : 

 the figure has been prepared from one of these females, kindly lent 

 for the purpose by M. Surcouf . 



In markings and general appearance Tabanus rothschildi, Surcouf, 

 closely resembles T. morsitans, Ricardo, a Somaliland species 

 extremely common on the Webi Shebeli, which in Ogaden is known 

 as " Balaad " and is believed to disseminate a disease which is 

 fatal to horses, mules, and camels.* The two species can, however, 

 be distinguished, inter alia, by the frontal callus, which in T. 

 morsitans is very large (about two-thirds as deep as broad), prominent, 

 and shining clove-brown, with its upper margin convex, while in 

 T. rothschildi, the callus is mummy-brown instead of clove-brown, 

 less than half as deep as broad, and its upper margin is concave. 



Tabanus taeniatus, Macquart. 

 Histoire Naturelle des Insectes, Dipteres, T. I., p. 207 (1834). 



PLATE XI., FIG. 80. 



Tabanus tceniatus, Macq., which was described from a female 

 from Cape Colony, also occurs in the Transvaal, but no specimens 

 have as yet been received from elsewhere. The localities, etc., 

 of the four examples in the Museum are as follows. " South 

 Africa," before 1844 (Dr. Andrew Smith). Simon's Town, Cape 

 Colony, February, 1893 (P. de la Garde, R.N.). Piet Retief, Trans- 

 vaal, October 25th (male) and November 1st (female), 1903 (Captain 

 Richard Crawshay). The female caught by Captain Crawshay was 

 taken on his stocking, which it was endeavouring to pierce with its 

 proboscis. 



This and the following species (Tabanus ruwenzorii, Ricardo 

 Plate XI., fig. 81), as well as Tabanus capensis, Wied., and T. 

 tenuicornis, Macq. (syn. T. stigma, Walk. nee Fabr.), all of which 

 have hairy eyes, belong to the subgenus Therioplectes, Zeller. 



* Letter from Dr. R. E. Drake-Brockman to Mr. C. E. Fagan, dated May 20th, 

 1905: cf. also Austen, " Monograph of the Tsetse-Flies" (1903), p. 307. 



