254 REVISION OF THE THYNNID.E OF AUSTRALIA, II., 



Both species were purchased by the British Museum from a 

 dealer many years ago, so that the localities are not on good 

 authority. 



I have also omitted Thynnus gravidus Westw. (Arc. Ent. ii. 

 2, p.141, P.82, fig.3, 1844) which, as I mentioned in the first part 

 of this paper, I believe to be the female of Oncorhinus xantho- 

 spilus Shuck., though without sufficient proof absolutely to sink 

 the name as a synonym. 



The following new species have come to hand since the publi- 

 cation of the first part of this paper : — 



Tachynomyia imbellis, n.sp. 



<J. Clypeus narrowly truncate at apex and deeply punctured. 

 Head coarsely rugose, broadly emarginate posteriori)', cheeks 

 with long grey pubescence. Pronotum short and broad, finely 

 punctured; mesonotum and scutellum rugose, scutellum narrowly 

 truncate at apex. Median segment rounded, strongly and closely 

 punctured. Abdomen subpetiolate, strongly but sparsely punc- 

 tured; first ventral segment with a longitudinal carina and 

 deeply separated from second segment. Hypopygium truncate 

 at apex, with a strong apical spine. Black; second, third and 

 fourth abdominal segments dark ferruginous. Wings hyaline, 

 with a faint fuscous cloud at apex; nervures black. Length 

 10 mm. 



//«&.— Perth, W.A. Type in British Museum. 



Rhytidogastkr discrepans, n.sp. 



£. Clypeus'subtruncate at apex, finely rugose; with a short 

 median carina from base, abruptly branched before centre and 

 continued as two parallel carinse to apical margin. Head finely 

 rugose, interantennal carina broadly V-shaped, a short transverse 

 carina below anterior ocellus. Thorax rugose; anterior angles 

 of pronotum prominent; scutellum triangular. Median segment 

 rounded, finely punctured-rugose. Abdomen shining, shallowly 

 punctured, most finely and closely on sides; segments 2-4 with a 



