BY ROWLAND E. TURNER. 210 



teriorly. First abdominal segment vertically truncate anteriorly,, 

 with four strong transverse carina? before apex and apical 

 margin recurved; second segment with seven transverse carina?, 

 including tbe recurved apical margin; the remaining segments- 

 smooth at base, with large sparse punctures near apex. Fifth 

 segment beneath transversely rugose. Pygidium contracted at 

 base, then obliquely truncate, transversely striate between 

 diverging marginal carina? to apex of epipygium, hypopygium 

 expanded at apex with membranaceous sides. Black; mandibles, 

 antenna? and legs fuscous. Length 12 mm. 



Hab. — Swan River (Smith); Champion Bay, W.A.(Du Boulay). 



168. T. morosus Sm. 

 Thynnus morosus Sm., Descr. n.sp. Hym. p. 168, n.28, 1879 (<£). 



<J. Clypeus broadly truncate anteriorly, shining, very sparsely 

 punctured. Scutellum raised above mesonotum, with a depressed 

 transverse line at base, broadly subtruncate at apex. First 

 abdominal segment beneath with an oblique triangular truncation 

 at apex, first and second segments separated by a shallow groove, 

 second segment feebly prominent in middle of basal margin 

 beneath. A short spine on each side at apical angle of sixth 

 segment beneath. Hypopygium with a strong spine on each 

 side near base, thence gradually narrowed, thence narrowly pro- 

 duced and slightly widened to base of apical spine, where it is 

 truncate. 



Hab. — Champion Bay, W.A. 



In fresh specimens t the thorax is clothed with long fulvous 

 pubescence; on the median segment and beneath the pubescence 

 is grey. 



169. T. flavilabris Guer. 



Thynnus flavilabris Guer., Mag. de Zool. xii. p. 8, 1842 (g); nee 

 Guerinius flavilabris Ashm., Canad. Ent. xxxv. 1903(^). 



(J. The first abdominal segment beneath has a small, oblique, 

 triangular truncation at apex. There is no spine at the apical 



