162 REVISION OF THB THYNNIDjE OF AUSTRALIA, II., 



near angles. Abdomen sparsely punctured; first segment 



depressed at apex, carina before depression slightly emarginate 



in middle; second segment with five transverse carinse, including 



the raised apical margin; pygidium elongate-ovate with a low 



median carina and the margins raised. Black; head, legs, second 



abdominal segment and pygidium bright ferruginous. Length 



9 mm. 



Hab.— Sydney, N. S.W.(Froggatt; <J$ in cop.). 



The female differs from that of T. luctuosus Sm., in the shape 



of the head, in the smoother thorax, the tubercles on the pro- 



notum and the broader pygidium. Further collecting is much 



needed to show the limits of the species in this group. 



92. T. (Agriomyia) luctuosus Sm. 



Thynnus {Agriomyia) luctuosus Sm., Cat. Hym. B.M. vii. p.26, 

 n.68, 1859(<J). 



Thynnus compressus Sm., I.e. p.43, n.118, 1859. 



<J, Legs black. Smith's notice of varieties with ferruginous 

 legs seems to apply to T. marginilabris Guer. 



£. Head large, much broader than long, strongly rounded at 

 posterior angles, much flattened, shining and very finely 

 shagreened, the front between antennae deeply emarginate, 

 clypeus with a median carina. Thorax and median segment 

 shining and sparsely punctured, pronotum broader than long, 

 much narrowed posteriorly, anterior margin straight, with pro- 

 minent angles from which spring a few long hairs. Mesonotum 

 longer than broad; median segment broadened from base, obliquely 

 truncate posteriorly. Abdomen broader than median segment, 

 the segments smooth at base and on the extreme apical margin, 

 elsewhere sparsely but deeply punctured; first segment with a 

 transverse carina near apex strongly emarginate in middle; second 

 segment with four strong transverse carinse, including the raised 

 apical margin; third segment with a depressed transverse line in 

 middle; third and fourth segments narrowly depressed on apical 

 margin; fifth segment with a longitudinal carina on apical half. 

 Pygidium oblique, ovate-lanceolate, the margins forming low 



