116 REVISION OF THE THYNNIL\E OF AUSTRALIA, II., 



legs ferruginous. Wings hyaline, nervures testaceous-brown. 

 Length 9 mm. 



9. Head smooth and shining, much broader anteriorly than 

 long, strongly narrowed posteriorly and slightly convex. Pro- 

 notum almost square, with a fine median sulcus from anterior 

 margin to centre. Mesonotum longer than broad, median 

 segment obliquely truncate posteriorly. Abdomen almost 

 smooth, much broader than thorax; first segment narrowly 

 depressed on apical margin; second segment with four transverse 

 carina? including the raised apical margin. Pygidium narrow, 

 elongate, slightly widened in middle. Head and thorax ferru- 

 ginous-brown, the median segment black, abdomen and legs 

 testaceous, coxa?, trochanters, and femora fuscous. Length 6 mm. 



Bab.— Wattle Flat, N.S.W. (Froggatt; $Q in cop.). 



Types in Coll. Froggatt. 



The male is very near T. pulchellus Klug, almost the only 

 points of difference being the presence of a frontal sulcus and the 

 shape of the basal abdominal segment. The female is quite 

 different, and the correctness of the pairing may be relied upon. 



31. T. (Aeolothynnus) quadricarinatus Sauss. 



Thynnus quadricarinatus Sauss., Reise d. Nov. Zool. ii. 1, Hym. 

 p.124, n.13, 1867($). 



I am unable to identify this species, but it seems from the 

 description to be allied to the pulchellus-group. 



Hob. — Sydney (Saussure). 



32. T. (AOELOTHYNNUS) MINUTUS Sm. 



Thynhus (Agriomyia) minutus Sm., Cat. Hym. B.M. vii. p.35, 

 n.92, 1859(5). 



£. Clypeus produced and very narrowly truncate at apex; 

 interantennal prominence long, bilobed, the lobes separated by a 

 narrow sulcus. Head and thorax finely and closely punctured; 

 median segment shining, very delicately transversely striated, 

 smooth at base. Abdomen slender, shallowly punctured; first 

 segment with a sulcus from base not reaching apex; second segment 



