204 REVISION OF THE THYNNID.E OF AUSTRALIA, II., 



151. T. BRENCHLEYI Sm. 



Thynnus brenchleyi Sm., Brenchley's Cruise of the Curagoa, 

 p.456,P.43,fig.2,1873( ( J). 



(J. Clypeus broadly truncate at apex, apical angles produced 

 into short spines, pointed at base and almost extending to apex 

 of the interantennal prominence. Head and thorax shining, 

 finely punctured, very sparsely on the mesonotum and scutellum, 

 the scutellum produced at apex into a fine tubercle, overhanging 

 postscutellum and median segment. Abdomen elongate-conical, 

 shining, finely punctured, sixth segment with a spine on 

 each side at apical angles beneath, dorsal plate of apical segment 

 longitudinally striate, broadly truncate at apex. Hypopygium 

 with a spine on each side at base, thence subtriangular with an 

 apical spine, transversely striated above. First segment beneath 

 prominent at base. 



Smith gives a good figure, but his description, as usual, is 

 almost confined to colour. 



£. Mandibles broad and flattened at base, pointed at apex, 

 with a minute tooth near middle of inner margin, external margin 

 fringed with long hairs. Clypeus and head strongly punctured, 

 head smooth on vertex and with a smooth, shallow depression on 

 each side above base of antennae, the space between the depres- 

 sions broad, with a longitudinal carina which extends to base of 

 clypeus. Front very strongly punctured, with long cinereous 

 pubescence, posterior margin of head broadly emarginate. Pro- 

 notum as broad as head, broadly emarginate anteriorly, shallowly 

 punctured, with a row of deeper punctures on anterior margin, 

 from each of which springs a long hair. Mesonotum very narrow, 

 rounded posteriorly, punctured, and clothed, except on anterior 

 margin, with long, dense, cinereous pubescence. Median segment 

 very short, almost vertically truncate posteriorly, smooth. First 

 abdominal segment vertically truncate anteriorly, surf ace of trunca- 

 tion smooth, slightly concave, with a median sulcus, dorsal surface 

 densely clothed at base with long fulvous pubescence, transversely 

 striate, with a transverse carina before apex and apical margin 



