278 REVISION OF THE THYNNID.E OF AUSTRALIA, I., 



6. entirely black. 

 a.2. Abdominal segments constricted. T . 'paradelx)ha^ n.sp. 



6"2. Abdominal segments not constricted. 



a^. Pubescence on head fulvous. T. ohliterata, n.sp. 



6^. Pubescence on head grey. T. senex Sm, 



c. Tibiae and tarsi ferruginous, T. 2^u)ictata, Sm. 



C. Hypopygium emarginate at the apex, with an apical spine, 

 a. Second and third abdominal segments ferruginous. 



a-. Postscutellum black ; mesothorax shining, sparsely 



punctured. T. sedidoides, n.sp. 



b'^. Postscutellum yellow; mesothorax opaque, closely punc- 

 tured. T. volatUis Sm. 

 h. Black, with ferruginous legs. 



rtt. Anterior margin of the prothorax and the postscutellum 



yellow . T. fervens Sm. 



D. Hypopygium broadened from the base to the apex, where it is 



emarginate with a long apical spine, 

 a. Black, the legs ferruginous. T. abstinens^ n.sp. 



E. Hypopygium subtriangular, the sides serrate; apical spine 



very short, 

 a. Black, the legs ferruginous. 

 a"2. Abdomen coriaceous, clothed with fine pubescence. 



T. 'piloHula Sm. 



F. Hypopygium rounded, with a short apical spine. 



a. Second and third abdominal segments ferruginous. 



a'^. Pubescence on the front pale golden. T. anrifrons Sm. 



h. Sides of all the abdominal segments ferruginous. 



a^. Anterior margin of the prothorax yellow. T. comhusta Sm. 



c. Black, the legs ferruginous or fuscous from near the base of 



the femora. T. moerens Westw. 



G. Hypopygium with a lateral spine on each side near the base 



or with prominent angles, thence gradually narrowed to the 

 base of the apical spine. 

 a. Hypopygium rounded at the base of the apical spine, 

 a^. Wings hyaline, crossed with a fuscous band. 



a^. Scutellum with an apical emargination and a small 

 tubercle on each side. 

 aA. Postscutellum and anterior margin of the prothorax 



white. T. fascipennis, n.sp. 



5=^ Scutellum without tubercles or emargination. 



a^. Wholly black. T. anthracina Sm. 



6"2. Wings hyaline, iridescent. 



a'^. Postscutellum and anterior margin of the prothorax white. 



T. Jlavojncto. Ritsema. 



