220 REVISION OF THE THYNNID^E OF AUSTRALIA, II., 



angles of the sixth ventral segment; the apical segment is rugose, 

 broadly rounded at apex. Hypopygium transversely striated at 

 base above, longitudinally striated near apex, with a blunt spine 

 on each side near base, thence gradually narrowed to base of 

 apical spine where it is narrowly rounded. The palpi are rather 

 longer and much stouter than in typical species of Thynnus. 

 Black; clypeus yellow, median segment densely clothed with 

 white pubescence. 



#- a &._Sydney, N.S.W. (G. A. Waterhonse). 



The female of this large and common Sydney species appears 

 to be still unknown. Ashmead's identification is undoubtedly 

 erroneous. The labrum of I 1 , flavilabris is not bilobed, nor are 

 the sides of the hypopygium almost straight. 



170. T. picipes Westw. 



Thynnus picipes Westw., Arc. Ent. ii. 2, p. 114, P. 77, fig. 2, 

 1844(<J). 



Thynnus pubescens Lepel., Hist. Nat. Hym. iii. p. 569, n. 2, 

 1845(<J). 



Thynnus oblongus Sm., Trans. Ent. Soc. London, 1868, p. 232, 



n.3(<J). 



Thynnus blasii D.T., Cat. Hym. viii. 103, 1897(£). 



(J. Closety allied to T. flavilabris Guer., but the clypeus is 

 much less coarsely punctured, the abdomen finely and closely 

 punctured and clothed with short, thin, white pubescence, and 

 the hypopygium is narrower. The tibiae and tarsi are dull ferru- 

 ginous. 



Hob. — Albany, W.A. (Westwood); Melbourne(French). 



171. T. obscuripennis Guer. 



Thynnus obscuripennis Guer,, Voy. Coq. Zool. ii. 2, p. 2 2 7, 1830 

 [1839](<J). 



I have not seen this species, which seems to be allied to the 

 shuckardi-group, but is apparently distinct from T. flaviventris. 



