BY ROWLAND E. TURNER. 227 



181. T. melleus Westw. 



Thynnus (Ayriomyia) melleus Westw., Arc. Ent. ii. 2, p. 118, 

 P.76, fg.4, 1844(<J). 



Thynnus melleus Sm., Cat. Hym. B.M. vii. p.67, 1859(9). 



(J. Median segment broad and short, rounded at sides. Hypo- 

 pygium small, often hardly showing beyond epipygium, basal 

 angles prominent, with a blunt tooth, thence sharply narrowed 

 to base of apical spine. 



9- Head broader than long, rounded at posterior angles, shining, 

 minutely and sparsely punctured. Thorax sparsely punctured; 

 pronotum with the anterior margin straight, with a few large 

 setigerous punctures, much broader than long, slightly narrowed 

 posteriorly. Median segment short, obliquely truncate pos- 

 teriorly. Abdomen very sparsely punctured; first segment with 

 the apical margin depressed, leaving a transverse carina emargi- 

 nate posteriorly before apex; second segment with three strong 

 transverse carinae, the space between them and the raised apical 

 margin with a few delicate transverse striae. The three follow- 

 ing segments with a raised curved mark on each side before apex. 

 Pygidium strongly contracted, lanceolate, truncate posteriorly, 

 the surface of the truncation long and very narrow, slightly 

 widened to apex. The colour varies from black to ochraceous. 



Hob. — Southern Australia from Champion Bay, W.A.(Du 

 Boulay) to Duaringa, Q (Barnard), <J9 in cop. 



182. T. insidiator Sm. 



Thynnus insidiator Sm., Descr.n. sp. Hym. p. 163, n. 15, 1879(^9). 



$. Clypeus truncate anteriorly, finely and sparsely punctured, 

 narrowly truncate at base and connected rather broadly with the 

 interantennal prominence, on which there is a very delicate longi- 

 tudinal carina. Head and thorax finely punctured-rugulose; 

 scutellum punctured, broadly subtruncate at apex. Median 

 segment depressed, oblique, the sides strongly inflated, very finely 

 punctured-rugulose, with a median sulcus from base, not reaching 

 apex. Abdomen elongate, rather sparsely punctured, an impressed 



