100 REVISION OP THE THYNNID^E OP AUSTRALIA, II., 



apical half. Pygidium lanceolate, very much contracted, slightly 

 broadened towards the apex by the expansion of the margins of 

 the hypopygium which form marginal carina?, leaving tlie epipy- 

 gium as a central carina. Dark fuscous; head, pronotuui and 

 legs dark ferruginous; second abdominal segment and pygidium 

 fusco-ferruginous. Length 7-9 mm. 



Hah.— Leura, N. S.W. (Froggatt; £9 in cop.). Types in Coll. 

 Froggatt. 



The male is very near T. sexmaculatus Sm., but the shape of the 

 hypopygium and of the median segment is different. 



9. T. (Zeleboria) trivialis Sm. 



Thynnus (Agriomyia) trivialis Sm., Cat. Hym. B.M. vii. p. 38, 

 n.101, 1859(^9). 



Aelurus fulvifrons Sm., Cat. Hym. B.M. vii.p.56,n. 12,1859(^9). 



Thynnus impatiens Sm., Descr.n.sp.Hym. p. 168, n.29,1879( ( J). 



The male diners from that of T. proximus in having the pro- 

 notum shorter, with the anterior margin strongly raised; hypo- 

 pygium narrower at the base, sides almost parallel, truncate at 

 the apex, with a short apical spine. The posterior margin of the 

 pronotum is yellow and there is a yellow spot on each side of 

 the second, third, and fourth abdominal segments. 



9. Head much broader than long, narrowed posteriorly and 

 strongly rounded at the angles, shining and sparsely punctured. 

 Thorax and abdomen finely rugose; pronotum as long as broad, 

 anterior angles prominent and subtuberculate; first abdominal 

 segment rather broadly depressed on the apical margin, carina 

 before the depression straight and transverse; second segment 

 with five transverse carina?; pygidium rather small, not contracted, 

 rounded at the apex, with an obscure longitudinal carina; fifth 

 ventral segment punctured. Fuscous; head, second abdominal 

 segment and pygidium fusco-ferruginous; mandibles, antennae, 

 legs and apical margin of the abdominal segments rufo-testaceous. 

 Length 6 mm. 



Hab — Lower Plenty (Bakewell); Victoria (French); Champion 

 Bay, W.A. (Smith). 



