Tabanidie of tlie Australian Region. 279 



black stripes visible, also with some yellowish recumbent 

 pubescence and longer black hairs, sides with long dark 

 hairs, paler below base of wings. Scutellum identical, bor- 

 dered with long yellowish hairs. Abdomen tawny, becoming 

 darker at apex, the median spots, composed of short yellowish 

 hairs, are short, triangular, forming a more or less continuous 

 stripe from the second to the sixth segment ; indistinct 

 brownish marks are often present, even on the basal seg- 

 ments, becoming more distinct on apical segments ; the 

 pubescence on dorsum is rather thick, consisting of short 

 black hairs and a few yellow ones intermixed on the second 

 and third segments ; hairs at sides are white, forming pre- 

 sumably the white stripes which Walker mentions ; segmen- 

 tations often grey tomentose ; underside identical, with 

 broader grey segmentations on the darker apical segments. 

 Leys pale yellowish, the femora reddish brown, covered with 

 white pubescence ; apical joints of tarsi blackish, pubescence 

 on tibise and tarsi black. IVings clear, veins brown, stigma 

 yellowish brown ; no appendix. 



Var, B, described by Walker, has brown spots on the first 

 and second segments. 



Tabanus brevier, Walker, List Dipt. i. p. 188 (1848). 



Tahanus anellosus, Summers, Ent. Notes London School Tropical 

 Medicine, p. 226 (1912). 



Type (female), in poor preservation, from Port Essington, 

 N. Australia, and another female from same locality (Gou/d). 

 This last was described by Walker as var. B of Tabanus 

 marginatus, Avhicli is a Silvias species (see Ann. & Mag. Nat. 

 Hist. (7) viii. p. 296, 1901) ; in general appearance it cer- 

 tainly bears a strong resemblance to Sylvius marginatus, but 

 may be at once distinguished by the absence of ocelli. 



A very small reddish-brown species. Palpi yellowish, the 

 same width throughout. Wings slender. Antennae reddish 

 yellow, with black tips. 



Length 8i mm. 



Face covered with ashy-grey tomentum. Beard yellowish. 

 Antenna tawny, the apical joints black, the first two joints 

 and the small tooth with black pubescence. Fcr^i yellowish, 

 with rather thick black and white pubescence. Forehead 

 about five times as long as it is broad anteriorly, j)arallel ; 

 frontal callus brown, pear-shaped, not quite reaching eyes, 

 with a rather stout lineal extension. Thorax denuded, 

 reddish brown, with grey tomentum. Abdomen short and 

 rather broad, tawny-coloured^ with darker brown markings, 



19* 



