BY ROWLAND E. TURNER. 149 



margins of pronotum, tegulse, a spot in middle of scutellum and 

 its lateral margins, postscutellum and a transverse spot on each 

 side of the five basal abdominal segments pale yellow; legs, 

 except coxae, ferruginous. Wings hyaline, nervures black, stigma 

 ferruginous. Length 7 mm. 



$. Head smooth and shining, about as long as broad, very- 

 much narrowed posteriorly, the sides compressed and slightly 

 concave. Thorax and median segment smooth and shining; pro- 

 notum much narrowed posteriorly, anterior margin straight with 

 prominent angles, surface flat. Mesonotum very small and 

 narrow; median segment narrow at base, broadened and obliquely 

 truncate posteriorly. Abdominal segments strongly punctured, 

 smooth at base and apex, apical margin broadly depressed; first, 

 third and fourth segments with a raised curved mark, emarginate 

 in middle posteriorly ; second segment with three transverse 

 oarinse and the apical margin slightly raised. Pygidium elongate, 

 about three times as long as broad, narrowly rounded at apex, 

 the sides parallel. Head, thorax, median segment and legs rufo- 

 testaceous; abdomen light ferruginous-brown, margins and sides 

 of the segments testaceous. Length 6 mm. 



Hab. — S. Australia. Types in Brit. Mus. 



77. T. (Aeolothynnus) cerceroides Sm. 



Thynnvs (Agriomyia) cerceroides Sm., Cat. Hym. B.M. vii. 

 p.34,n.87, 1859(5). 



Thynnus perelegans Sm., Descr.n.sp. Hym.'p.l67,n.25,1879( ( J). 



(J. Clypeus strongly convex, moderately produced and truncate 

 at apex. Head closely and strongly punctured; thorax and 

 median segment coarsely punctured, anterior margin of pronotum 

 not elevated. Abdomen shining, sparsely punctured, the seg- 

 ments constricted at base; apical angles of ventral segments 3-5 

 prominent, sixth ventral segment with a spine on each side at 

 apical angles. Hypopygium truncate at apex and narrow, with 

 an acute apical spine. In some specimens the apical angles of 

 the hypopygium are produced into short spines. Length 7-1 1 mm. 



