14 Transactions. — Zoology. 



In the female the femora are rather darker than in the- 

 male, and the grey margin of the abdominal segments is pro- 

 duced forwards into a central triangular mark. 



Hab. Wellington (Hudson); Ashburton (W. "W. Smith). 



This is the only species of Tabanus that I have seen from 

 the South Island, and here it is very rare. 



Tabanus transversus. 



T. transversus, Walker, Cat. Dipt, in Brit. Mus., part v., Supp., 

 p. 256 (1854) ; Hutton, Cat. Dipt. N.Z., p. 21. 



Eeddish-brown, the legs and under-surface paler. Wings 

 colourless, the stigma pale-brown ; the veins brown. Antennae 

 with the first and second joint yellow, the third black. Palpi 

 pale- tawny, the proboscis brown. 



The male differs from the female in having four dusky 

 stripes on the thorax, and the abdomen is brown, with a row 

 of triangular tawny spots down the centre. The wings also 

 are brownish, and have darker cloudy spots at the fork of the 

 third longitudinal, on the chief and posterior cross-veins, and 

 on the outer margin of the discal cell. Length, $ 9 mm., 

 J 10 mm. ; wing, <?10mm., $11 mm. 



Hab. Auckland (Colonel Bolton and Captain Broun). 



The male of this species is remarkable for the very large 

 facets of the eyes, a fact probably of sufficient importance to 

 place it in a different genus from the rest. They are without 

 hairs in both sexes. 



Genus Silvius, Meigen (1820). 



First and second joints of the antenna? short, the third not 

 toothed, with five rings. Second joint of the palpi cylin- 

 drical in the male. Ocelli generally present. The face with- 

 out callosities. Hind tibiae without spurs. Neuration of the 

 wing as in Pangonia ; the first posterior cell open. 



Sylvius maorium. 



Me&omyia maorium, Bigot, Mem. Soc. Zool. de France, 

 vol! v., p. 621 (1892).' 



" Male. — Proboscis, palpi, and antennae black ; the first 

 and second joints of the last grey ; face blackish, with some 

 grey hairs; front grey. Thorax and scutellum opaque-black, 

 abdomen black, the segments bordered with obscure grey. 

 Calyptrae and halteres pale-yellow. Legs pale- yellow, the 

 femora, distal portion of the tibiae, and all the tarsi black. 

 Wings nearly hyaline, the stigma brown. Length, 8|mm.'' 

 (Bigot). 



A specimen from Wellington, which I believe to be the 

 female of this species, has the first and second joints of the 



