*282 REVISION OF THE THYNNID^ OF AUSTRALIA, I., 



the base. Hypopygium almost truncate at the apex, with a 

 strong apical spine, the apical angles produced into very short 

 spines, and the margiy notched, giving it a serrated appearance. 

 Antennae rather shorter than in the allied species. Entirely 

 black. Wings hyaline, nervures fuscous. Length 14 mm. 



Hah. — Victoria (French). 



Somewhat resembles some species of Thynnoides^ but tlie mouth- 

 parts show it to be a true Tachynomyia. 



T. OBLITERATA, n.Sp. 



(J. Head finely rugulose, densely clothed with long fulvous 

 pubescence, and a long beard of the same colour on the sides; a 

 short, sharp spine at the base of the mandibles. Clypeus clothed 

 with long golden pubescence, with a carina from the base to the 

 apex. Prothorax finely, mesothorax and scutellum more coarsely 

 rugulose; the scutellum short, broadly truncate at the apex; the 

 prothorax thickly, the mesothorax more thinly clothed with 

 fulvous pubescence. Median segment finely reticulate, punctured 

 at the extreme base, with long griseous pubescence on the sides. 

 Abdomen subpunctate, ovoid, the sculpture very shallow and 

 indistinct, a sulca on the first segment from the base almost 

 reaching the apex, second segment depressed at the base, the 

 pubescence on the sides of the abdomen griseous, on the epipy- 

 gium pale fulvous. Hypopygium with a slightly recurved apical 

 spine, a short blunt tooth on the apical margin, close to the base 

 of the apical spine, and another at the apical angle rather longer 

 and more acute, giving the apical margin the appearance of being 

 doubly notched on each side. Black; the mandibles fuscous at 

 the apex, the tegulae and the spines of the tibise and tarsi fusco- 

 ferruginous. Length 11mm. 



9. Unknown. 



Hab. — S. Australia. 



Type in Coll. Froggatt. 



T. SENEX Sm. 



Aeleurus senex Sm., Cat. Hym. B.M. vii. p. 54, n.5, 1895((J). 



Thyn7ius schroederi D.T., Cat. Hym. viii. 115, 1897((J). 



Hab.— Waggs,, N. S.W.; Melbourne, Vic. 



