806 



AUSTRALIAN TABANID^. No. i. 



By Frank H. Taylor, F.E.S. 



(From The Australian Institute of Tropical Medicine.) 



The species of the genus Silvius, Subfamily Pangoni7i(E, oc- 

 curring in Australia, are more commonly found in those parts 

 north of the Tropic of Capricorn than elsewhere, as only two 

 species are known from localities further south, namely, S. 

 Silvester Berg., and S. australis Ricardo; the latter, however, 

 also occurs at Townsville. 



Walker (1848) described 8. marginatus from Port Essington, 

 placing it in the genus Tahanus; and, in 1857, he described S. 

 nitescens from Australia. From that time, until Bergroth(1894) 

 described S. silvester from Duaringa, no new Australian species 

 were added. Then Summers (1912) described three new species, 

 S. nianso7ii, S. alcocki, and S. strangmani, all from the Northern 

 Territory. 



The present paper adds eight new species to the genus, bring- 

 ing the total to fourteen species occurring in Australia. There 

 still remain two species, held over for the present, in the Insti- 

 tute Collection, besides four others, descriptions of which, Miss 

 Ricardo informs me, will shortly be published in the Annals and 

 Magazine of Natural History. 



The type-specimens are in the Institute Collection. 



Silvius hilli, sp.n. 



5. Length, 11-13; width of head, 4-4*2; width of front at 

 vertex, 0*5-0-7; length of wing, 9-8-11 mm. 



Head : front grey, with a creamy tinge, black when denuded, 

 with a moderately deep groove running from the apex of the 

 frontal callus to the ocellar triangle; face pale ochraceous, white 



