206 REVISION OF THE THYNNID^ OF AUSTRALIA, II., 



whole insect is finely and much more closely punctured and 

 opaque. 



Hab. — Champion Bay, W. A. (Smith). 



153. T. darwiniensis, n.sp. 



$. Clypeus produced at apical angles into short spines, broadly 

 emarginate between the spines, the emargination broken in the 

 centre by a slight projection; sparsely punctured, prominent and 

 pointed at base. Head finely and closely punctured, a short, 

 V-shaped carina between antennae, apex touching base of clypeus; 

 a very fine longitudinal sulcus from apex of carina nearly reach- 

 ing anterior ocellus. Pronotum finely punctured, most closely 

 at sides. Disc of mesonotum and scutellum sparsely punctured, 

 mesonotum with the usual two lateral sulci, the space between 

 the sulci very finely and closely punctured. Median segment 

 vertically truncate, finely punctured on sides, scutellum and post- 

 scutellum broadly rounded posteriorly, postscutellum reaching to 

 the truncation of median segment, but not projecting beyond it. 

 Mesopleurse very finely punctured, clothed with short white 

 pubescence. Abdomen shining, rather sparsely punctured, seg- 

 ments smooth on apical margin. First segment vertically trun- 

 cate anteriorly, with a shallow median sulcus on truncation, as 

 broad as second segment. Sixth segment beneath with a lateral 

 spine at apical angles. Dorsal plate of epipygium coarsely longi- 

 tudinally striated, emarginate at apex. Hypopygium with a 

 prominent spine on each side near base, thence strongly narrowed, 

 apical angles produced into short blunt spines at base of the 

 strong apical spine. Abdomen beneath more coarsely punctured, 

 with fine grey pubescence. Black; clypeus, labrum and mandi- 

 bles pale yellow, mandibles ferruginous at apex ; carina 

 between antennae, a small spot below anterior ocellus, two 

 minute spots on vertex and margins of eyes narrowly 

 interrupted at apex ochraceous-brown, margins of prothorax 

 luteous-yellow; two oblique lines on each side of mesothorax, 

 posterior margin of scutellum, the whole of postscutellum 

 narrowly interrupted near the anterior angles and the truncation 



