216 G. E. J. NIXON 



Antenna about as long as the body, with the preapical segment one and two thirds as long as 

 wide. 



Mesoscutum conspicuously but finely punctate on anterior half ; between the mesoscutum and 

 the disc of the scutellum a wide, coarsely, deeply costate furrow. Lateral, polished zone of the 

 scutellum only very weakly convex in the anterior direction (in this respect markedly different 

 from group of zonaria). Radius strongly downcurved at apex ; ist abscissa of the discoideus 

 about two thirds as long as the 2nd (Text-fig. 263) ; vannal lobe with distinct hair-fringe 

 throughout. 



Tergite 1 polished throughout. Ovipositor sheath about one and a half times longer than the 

 hind tibia ; ovipositor itself rather thick, evenly and slightly downcurved at apex. 



Length: ca. 3-5 mm. without ovipositor. 



Australia : S.E. Queensland, Tambourine Mts., 1-19.V.1935, 1 $, the TYPE, 

 (R. E. Turner) ; F. C. T., Blundell's, 23.iii.1930, 1 $, (/. M. Mackerras). 

 Type in the British Museum (Nat. Hist.). 



A most distinctive species on colour alone. I have met with no species with which 

 it could be confused. 



The RESPLENDENS-Grovp 

 Monobasic. 



Hypomicrogaster resplendens (Wilkinson) comb. n. 



Microgaster resplendens Wilkinson, 1929 : 106. 



5. Mesoscutum, tergite 1, the median field of tergite (2 + 3) and the whole of the underside 

 of the gaster bright yellow ; the body otherwise black. Hind coxa and hind femur yellow ; 

 hind tibia infuscate at apex, the infuscation more extensive on outer side. 



Top of head smooth, shining, virtually impunctate. Ocelli in a moderately high triangle, the 

 posterior tangent to the anterior ocellus passing slightly in front of the other pair. Antenna 

 rather thin, hardly as long as the body, with segment 17 about one and one third times longer 

 than wide ; pubescence of flagellum somewhat bristly. 



Mesoscutum highly polished and with only very superficial punctation. Scutellar disc slightly 

 extended backwards to cover the base of the postscutellum ; the posterior extremities of the 

 lateral rugose areas unusually wide apart (Text-fig. 257). Suture between the mesoscutum and 

 the disc of the scutellum shallow, markedly convex in the forwards direction and consisting of an 

 even row of numerous, small fovae. Areolet of the fore wing 4-sided, the 2nd transverse cubitus 

 received onto the base of the 2nd abscissa of the radius. Vannal lobe with fringe of long sparse 

 hairs throughout. Propodeum smooth, polished anterior half. 



Tergite 1 with traces of rugosity on its posterior, turned over part. Ovipositor sheath broken, 

 but judging from the length of the ovipositor, fully twice as long as the hind tibia. 



Length: 3 mm. without ovipositor. 



S. Tasmania : Mt. Wellington, TYPE $ only. 

 Type in the British Museum (Nat. Hist.). 



It is difficult to point to a relationship Math any other group of species within 

 Hypomicrogaster. On the shape of the areolet and the shape of the basal tergites, 

 resplendens could not be excluded from the vacillatrix-gvoup. But the species I put 

 in this latter group have the hind spurs markedly different in length and the propo- 

 deum almost always with a medial keel. 



The general appearance of the disc of the scutellum is the most striking feature of 

 this species. 



