812 AUSTRALIAN TABANID^, i., 



Wings hyaline; stigma elongate, yellowish-brown, moderately 

 conspicuous; veins yellowish-brown; squamse grey, with pale 

 brown edges; halteres brown. 



Legs reddish-brown, clothed with semi-erect, dark hairs; tarsi 

 darker than femora and tibiae; tibial spurs brown, very short. 



Hab. — Booroolooloo, Northern Territory. 



Described from a single specimen, collected by Mr. H. S Giles, 

 January, 1912, and presented to the Institute. It is a small, 

 and dingy species, which distinguishes it from other Australian 

 species. 



SiLVIUS ELONGATULUS, Sp.n. 



9. Length, 7-5-9; width of head, 2-1-2-5; width of front at 

 vertex, 0* 2-0-3; width across lower edge of frontal callus, 0-5-0-75; 

 length of wing, 7-8-8 mm. 



Head: front grey, tinged with pale brown; ocellar triangle 

 light brown; ocelli light brown; frontal callus shining, dark 

 reddish-brown, broadly wedge-shaped, the lower edge slightly 

 rounded, and nearly resting on the subcallus; eyes black, naked, 

 their inner margins converging towards the apex; face dark 

 grey, clothed with grey hair; antennae with first segment dark 

 reddish-brown, fairly long, second segment about one-third of 

 the length of the first, slightly paler, both clothed with black 

 hairs, base of third segment bright reddish-brown, broadly tri- 

 angular, annuli dark brown; palpi brown, about two-thirds the 

 length of the proboscis, the latter comparatively long. 



Thorax uniform, dull reddish-brown, clothed with a moder- 

 ately dense covering of dull, golden bloom, and brown hair; 

 scutellum brown, covered with grey bloom; pleurae and pectus 

 dark brown, covered with grey bloom. 



Abdomen brown, with the posterior margins of the segments 

 pale, giving the abdomen a banded appearance; venter brown, 

 clothed with greyish-white bloom, and scattered, pale hairs. 



Legs : femora, tibiae, and tarsi dark reddish-brown; femora 

 clothed with grey hairs; tibiae and tarsi clothed with dark brown 

 hairs, knees pale; tibial spurs reddish-brown, spurs on hind-tibiae 

 about half the length of those on the mid-tibiae. 



