214. Miss G. RicaiJo on TabauiJse from 



broader anteriorly^ about four times as long as it is bro'ad, 

 covered with grey tomeutum ; frontal callus brown, pear- 

 sliaped, -with short lineal extension ; pubescence scanty, 

 Avliite ; ocelli distinct. Thorax blackish, covered with grey 

 tomentuni ; ])ubescence black, with some apj)ressed white 

 hairs. Scutelium same colour. Abdomen black with black 

 pubescence ; bands of white hairs on posterior borders of the 

 first four segments, not reaching the middle of segment ; 

 underside black with three complete white bands. Leys 

 black with black pubescence. Wings dark brown, pale at 

 the extreme apex, with a clear streak below the stigma, 

 and the extreme edge of the posterior border of wing 

 al-o pale. 



Silvhis fergusonij ? , sp. n. 



Type (female) from Nelson Island, Hawkesbury Riv^er, 

 Nevv South Wales, 26.2. 16. 



This handsome species, named after the donor, is nearly 

 allied to Silcius nigripenjiis, sp. n., from the northern part of 

 Australia ; but is distinguished by the pale base of wing. 

 These two species, together with SUvius yrandis, sp. n.,form 

 a grouj) unlike the typical forms by their hirger size and 

 dark abdomens marked with paler segmentations, and by 

 their coloured wings. 



This species measures 17 mm. 



Face covered with light ashy-grey tomeutum and with 

 some silvery-white hairs in centre of face, and longer, more 

 numerous ones in the furrows between the face and the 

 cheeks, joining the beard of same colour. Pu/pt blackish, 

 with some ashy-grey tomeutum, and short dark liairs; they 

 are large and stout with an obtuse point. Aniennce black, 

 the fiist two joints with black hairs, the third large and 

 wide at the base with a distinct angle. Subcallus same 

 colour as face. Forehead same.colonr, narrow, parallel, 

 about six times as long as it is broad anteriorly ; the frontal 

 callus black, shining, not reaching the eyes, pear-shaped, 

 with a long stout lineal extension reaching the ocelli. 

 Thorax blackish brown, somewhat shining, with two grey 

 tomentose stripes and grey at sides ; pubescence chieliy 

 black; some white liairs on the stripes; pubescence on 

 shoulders long, black, with tufts of white liairs at base of 

 wings. Scutelium the same colour. Abdomen blackish 

 brown, the first two segments with broad grey tomentose 

 bands, which are represented on the remaining segments 

 only at the sides; these bands have white liciirs. thickest at 



