260 Miss G. Ricartlo on the 



off, it is difficult to decide ; but ocelli and; small spines on 

 the tibiae are present. 



It is a brownish-coloured small fly, with paler segmenta- 

 tions on the abdomen, covered with white hairs, and the 

 thorax has grey tomentose stripes. The forehead is parallel, 

 with a small reddish-brown frontal callus, reaching the eyes, 

 which are bare. Legs reddish yellow. Wings clear. 



Length 11 mm. 



Silvias larida, ? , Walker, List Dipt. i. p. 140 (1848) [Pan- 

 gonia] ; Ricardo, Ann. & Mag. Nat. Hist. (7) v. p. 121 

 (1900). 



Type (female) from Port Stephen, New South Wales, 

 with a note, "Very troublesome to man and cattle," and 

 another female from Swan River, W. Australia. 



This type and the other female are both in bad condition, 

 but as they clearly possess ocelli and spines on the hind 

 tibiae, they do not belong to any genera of the Tabaninse, 

 and the antennae having only five divisions on the third joint 

 precludes them from belonging to the genus Pangonia. The 

 shape of the palpi, which are long and slender, with trun- 

 cated tips as in Silvius marsoni and other species of Silvias 

 from Australia, leads me to place them in this genus. 



A rather large species compared with others of the genus. 

 Face reddish, covered with grey tomentura. Beard white. 

 Palpi long and slender, cylindrical, slightly dilated, and con- 

 cave at base, with the tips truncated, yellowish in colour, 

 about a third of the length of proboscis. Antenna reddish, 

 the third blackish ; the first joint short, with some black 

 pubescence, the second \ery small, cup-shaped, the third 

 with the first division large and broad, the last four joints 

 very small. Subcallus shining red, with traces of grey 

 tomentum, protuberant and large. Forehead parallel, hardly 

 more than three times as long as it is broad, with a large, 

 broad, shining reddish stripe as frontal callus, ending 

 posteriorly in a short point. Eyes bare. Ocelli distinct. 

 Thorax appears reddish, with three dark stripes, covered with 

 grey tomentum; it is probably very much denuded. Scu- 

 tellum reddish. Abdomen reddish yellow, with traces of grey 

 tomentum on the segmentations and on dorsum of apical 

 segments; it is also much denuded. Legs reddish, the tarsi 

 dusky. Wings clear, veins and stigma yellowish, the poste- 

 rior cells all widely open, no appendix. 



The above description is of the type only ; the other 

 female is probably identical, but the forehead seems narrower 



