62 AUSTRALIAN TABANID^E, iv., 



no lineal extension, resting on the subcallus, and about one- 

 third of the width of the front; subcallus black, toinentum grey; 

 palpi yellowish, pubescence pale, apical third of second joint 

 uniform in width, and ending in a blunt point; first two joints 

 of antennae reddish-brown, pubescence black, basal portion of 

 third darker than first two, annuli black. 



'Thorax black, tomentum brown, greyish anteriorly, pubescence 

 black, scutellum similar; pleurse with grey tomentum and scat- 

 tered grey pubescence. 



Abdomen: second segment yellowish-brown, the remaining 

 segments brown, the apical four black when abraded, pubescence 

 black; all segments with indistinct, apical, median, grey spots, 

 segmentations yellowish; venter black, with greyish tomentum 

 and pale pubescence, segmentations pale. 



Legs black, femora and coxse with grey tomentum and pubes- 

 cence, long on coxse, knees pale, apical half of femora and basal 

 two-thirds of tibi»3 yellowish-brown, mid-tibiae entirely so, tarsi 

 dusky, with black pubescence. 



Wings clear; veins dark brown, cross-veins at base of discoidal 

 and adjacent cells faintly clouded brown; stigma yellow; ap- 

 pendix present. 



Hab. — N. Territory: Darwin (G. F. Hill). 



Type unique. Apparently more closely related to T. sequens 

 Walker, than to others of Group ix. 



Tabanus silvifoumis, sp.n. 



£. Length, 8-5-1T5; width of head, 3-4; length of wing, 775- 

 10 mm. 



A small, reddish-brown species, very similar to Silvius front- 

 alis Ricardo, in appearance. Thorax, abdomen, and legs reddish- 

 brown. Antenme reddish. Wings with brown veins, no ap- 

 pendix. 



Head: face with cream-coloured tomentum, tomentum on 

 cheeks grey, pubescence brownish; beard pale, very scanty; front 

 with dark-brown tomentum, narrower at the vertex; frontal 

 callus chestnut brown, almost square, resting on subcallus, nearly 

 as wide as front, with a short, stout, extension; subcallus grey, 



