BY ROWLAND E. TURNER. 125 



base of the posterior coxae, the tegulae, a quadrate spot on the 

 mesonotum, a large spot in the middle and a small one at each 

 of the anterior angles of the scutellum, thepostscutellum, a broad 

 curved mark on each side of the median segment, a broad band 

 narrowly emarginate posteriorly on the second abdominal seg- 

 ment, an interrupted band on the first, third and fourth segments, 

 a large spot on each side of the fifth, a triangular spot at the 

 apex of the first ventral segment and a band emarginate pos- 

 teriorly on ventral segments 2-4 yellow; the legs ferruginous. 

 Wings hyaline, nervures fusco-ferruginous. Length 10 mm. 



Hab. — S. Australia; Wimmera, Vic. (French). Type in Brit. 

 Mus. 



45. T. (Aeolothynnus) optimus Sm. 



Thynnus optimus Sm., Cat. flym. B.M. vii. p. 29, n.74, 1859(<J). 



(J. Clypeus moderately produced, rather broadly truncate at 

 apex, narrowly truncate at base. Head and thorax finely and 

 closely punctured; interantennal prominence emarginate and not 

 much developed; scutellum sparsely punctured; median segment 

 almost smooth, much longer than broad. Abdomen elongate, 

 flattened; segments 2-5 with a very faint transverse line near 

 base and the apical margin slightly depressed, most broadly so 

 in middle; hypopygium narrowly truncate at apex, with an apical 

 spine. 



Hab. — Swan River, W.A. (Smith). 



46. T. (Aeolothynnus) sulcatus Sm. 

 Thynnus sulcatusSm., Cat. Hym. B.M. vii. p.42, n. 11 7, 1859(9). 

 Q. Head a little broader anteriorly than long, slightly narrowed 



posteriorly, smooth and shining, the front broadly prominent, 

 with a deep depression on each side, vertex sparsely punctured. 

 Pronotum much broader than long, subrectangular. Second 

 abdominal segment with four transverse carinse, including the 

 recurved apical margin. Pygidium lanceolate, sides of the hypo- 

 pygium expanding a little towards apex. 

 Hab. — Swan River. 



