112 REVISION OF THE THYNNID^ OF AUSTRALIA, II., 



elevated; second segment with three transverse carina?, including 

 the raised apical margin; third and fourth segments with a raised 

 curved mark on each side. Pygidium very narrow, the sides 

 parallel, a few delicate longitudinal stria? near base, apex slightly 

 recurved. 



Hah. —Adelaide, S. A. (Smith). 



Very near T. trifidus Westw., and T. carinatus Sm. 



26. T. (Glaphyrothynnus) sitiens, n.sp. 



$. Clypeus strongly convex, rather broadly truncate at apex, 

 sparsely punctured, with a delicate carina from base reaching 

 beyond centre. Head rugose, interantennal carina very broadly 

 V-shaped. Thorax sparsely and rather finely punctured, shining; 

 median segment very minutely punctured. Abdomen elongate, 

 slender, shining and very finely punctured; first segment with a 

 very short sulcus at the base; second segment depressed at base; 

 hypopygium narrow, unarmed at apex, with a short, slender 

 spine on each side near base. Black; mandibles, apex and sides 

 of clypeus, margins of eyes as high as base of antennae, inter- 

 antennal carina, margins of pronotum narrowly interrupted on 

 anterior margin, tegula?, a curved mark on the mesopleura? 

 beneath the anterior wings and a spot above intermediate coxa?, 

 a spot on mesonotum, a spot on centre of scutellum, postscutellum, 

 a narrow curved mark close to apical margin on each side of 

 second and third abdominal segments, a spot on each side of 

 fourth and fifth segments and a line on anterior coxa? and femora 

 beneath yellow; tibia? and tarsi and a small spot on each side of 

 vertex ferruginous. Wings hyaline, nervures black. Length 

 9 mm. 



Hah. — Western Australia (Du Boulay). Type in Brit. Mus. 



27. T. (Glaphyrothynnus?) sedulus Sm. 



Thynnus (Agriomyia) sedulus Sm., Cat. Hym. B.M. vii. p. 35, 

 n.90, 1859((J). 



(J. Clypeus large, broadly produced and truncate at apex, very 

 strongly convex at base, deeply punctured, with a short carina 



