110 REVISION OF THE THYNNIDjE OF AUSTRALIA, II., 



and a minute spot at summit of the eyes ferruginous. Wings 

 hyaline, nervures fuscous. Length 14 mm. 



Hab.— Shoalhaven, N. S.W. Type in Coll. Froggatt. 



Nearest to T. xanthorrhoei Sm., but is slenderer and the 

 divisions between the abdominal segments are more strongly 



marked. 



22. T. (Glaphyrothynnus) marginalis Westw. 



Thynnus (Agriomyia) marginalis Westw., Arc. Ent. ii. 2, p. 120, 

 P.76,fig.3,1844(cJ). 



$. Clypeus broad and large, convex, with a median longi- 

 tudinal carina, emarginate at apex. Head rugose. Abdomen 

 rather narrow at base, gradually widened to fourth and fifth 

 segments which are the broadest. 



Allied to T. trifidus Westw. 



Q. Head nearly twice as broad as long, slightly narrowed and 

 rounded posteriorly, shining, finely and shallowly punctured. 

 Thorax shining, finely punctured; pronotum much broader than 

 long; mesonotum very small; median segment short, obliquely trun- 

 cate posteriorly, sparsely and very finely punctured. Abdomen 

 much broader than thorax, smooth and shining; apical margin 

 of first segment recurved, with a broad depressed area before it; 

 second segment with three transverse carina?, including the 

 recurved apical margin; third and fourth segments with a raised, 

 curved, punctured mark on each side close to apical margin; 

 pygidium elongate-ovate, the margins elevated at base. Black; 

 antennae, mandibles and legs dull rufo- testaceous; sides and 

 apical margin of abdominal segments testaceous. Length 9 mm. 



Hab.— Albany, W.A. (Brewer); Perth, W.A. (Walker). 



Types ((JQ) in Oxford University Museum. 



23. T. (Glaphyrothynnus) trifidus Westw. 

 Thynnus (Agriomyia) trifidus Westw., Arc. Ent. ii, 2, p. 11 9, 



P.77,fig.4,1844( ( J). 



Zeleboria imitatrix Sauss., Reise d. Nov. ii. 1, Hym. p. 132, n.3, 

 1867(£). 



Thynnus imitator Schulz, Spolia Hymenopterologica, p.161, 

 1906(£). 



