BY ROWLAND E. TURNER. 231 



186. T. TUBERCULIFRONS Sill. 



Thynnus tuberculifrons Sm.,Descr.n 8p.Hym.p.l61,n.9,187 9( ( J). 



£. Clypeus truncate anteriorly, apical angles slightly produced, 

 sparsely punctured. The blunt tubercle mentioned by Smith is 

 merely the apex of the usual interantennal carina. Scutellum 

 rather narrowly subtruncate at apex, median segment oblique 

 from a little behind postscutellum, with a short median sulcus 

 from base, and rounded at sides. Hypopygium triangular with 

 a short apical spine and a slight rounded projection on each side 

 at basal angles. 



£. Head subrectangular, slightly rounded at posterior angles, 

 much broader than long, slightly convex, and finely punctured. 

 Thorax sparsely punctured, pronotum about twice as broad as 

 long, raised in middle and longitudinally subcarinate, the anterior 

 margin straight, very little broader than posterior margin, which 

 is broadly and very slightly emarginate. Median segment 

 punctured, short, obliquely truncate posteriorly. First abdominal 

 segment very broadly depressed at apex, with a curved, raised 

 mark on each side above basal truncation. Second segment with 

 three prominent carinas near base, apical area obscurely trans- 

 versely striate, apical margin a little raised; third and fourth 

 segments depressed at apex, smooth, with a raised, curved, 

 punctured mark on each side. Pygidium lanceolate, very narrow, 

 slightly widened at apex. Length 11 mm. 



Hab. — Swan River, W.A. (Smith; £Q in cop.). 



The female from which my description is taken is damaged by 

 gum about the head and on the apex of the abdomen. The male 

 has a superficial resemblance to T. carbonarius Sm,, but is quite 

 different in the shape of the clypeus and hypopygium. There is 

 no spine on the sixth ventral segment in T. tuberculifrons, and 

 no produced dorsal plate on the apical segment. 



187. T. ANDREANLS, n.sp. 



(J. Clypeus longitudinally punctured-striate, not much pro- 

 duced, broadly truncate anteriorly, the margin very narrowly 

 depressed. Antennas as long as thorax and median segment 



