HYMENOPTERA. 35 



abdomen shining, and having a number of scattered shallow 

 punctures, covered with a thinly scattered griseous pubescence ; 

 wings hyaline and iridescent, the nervures and tegulai rufo- 

 testaceous. The antennae, anterior margin of the clypeus, the 

 mandibles and legs, ferruginous. 



Hab. Australia (Swan River). 



90. Thynnus (Agriomyia) sedulus. B.M. 



Male. Length 3^ lines. — Black, with the legs, the apex of 

 the first, the second, third, and fourth segments of the abdomen 

 ferruginous ; a few scattered hairs on the head and thorax, the 

 abdomen having a thin clothing of longer hair at its apex. The 

 clypeus rufo-testaceous, with its margins, the inner orbit of the 

 eyes, the mandibles, and an interrupted line behind the eyes, 

 yellow; an interrupted line on the prothorax in front and a 

 spot beneath the wings yellow ; the coxae and trochanters black ; 

 the wings hyaline and iridescent, their nervures, and also the 

 tegulse, rufo-testaceous. 



Hab. Australia. 



91. Thynnus (Agriomyia) fallax. B.M. 



Male. Length 5 lines. — Black : head and thorax very closely 

 punctured; abdomen smooth, shining, and with a few widely 

 scattered delicate punctures. The clypeus with a small shining 

 tubercle in the middle, its anterior margin truncate ; the man- 

 dibles and antenna? ferruginous, four or five of the apical joints 

 of the latter fuscous, and the tips of the former blackish ; the 

 wings flavo-hyaline, the nervures ferruginous, becoming testa- 

 ceous towards the base of the wings, the tegulae rufo-testaceous ; 

 the legs ferruginous, with the coxae, trochanters, and base of the 

 femora black; the apex of the abdomen with a little fulvous 

 pubescence. 



Hab. Australia (Adelaide). 



92. Thynnus (Agriomyia) minutus. B.M. 



Male. Length 2^ lines. — Black : the head and thorax varie- 

 gated with yellow, the abdomen reddish in the middle. The 

 clypeus, mandibles, and two abbreviated lines between the an- 

 tennae yellow. The anterior and posterior margins of the pro- 

 thorax, the tegulae, extreme base of the wings, a bell-shaped spot 

 on the scutellum, a line at the sides of the metathorax, and a 

 spot beneath the wings, yellow ; the latter hyaline and irides- 

 cent, with the nervures rufo-tesTaceous; the legs rufo-testaceous ; 

 the coxae black, spotted with yellow. Abdomen rufo-testaceous. 



