108 REVISION OF THE THYNNID^ OP AUSTRALIA, II., 



19. T. (Zeleboria 1) longicornis, n.sp. 



£. Clypeus narrowly subtruncate at the apex, densely covered 

 with silver pubescence. Head very finely and closety punctured, 

 broadly emarginate posteriorly, interantennal prominence deeply 

 emarginate at apex; antennae long and slender, as long as the 

 abdomen. Thorax finely and closely punctured; anterior margin 

 of pronotum strongly raised; scutellum with a depressed trans- 

 verse row of large punctures at base, narrowly rounded at apex. 

 Median segment long and rather slender, finely punctured at 

 base, delicately transversely rugulose at apex, with an obscure 

 sulca from the base to the middle. Abdomen subpetiolate, 

 elongate, flattened, smooth and shining; the two apical segments 

 coarsely punctured. H/vpopygium rounded, with a slightly 

 recurved apical spine. Entirely black. Wings hyaline, faintly 

 tinged with fuscous, nervures fuscous. Length 18 mm. Exp. al. 

 28 mm. 



Hab.—N.W. Australia (French). 



This species approaches Tachynomyia, but I think it is most 

 naturally placed here. 



Subgenus Glaphyrothynnus, n.subgen. 



Zeleboria Sauss., Reise d. Nov. Zool. ii. 1, Hym. p.131, 1867 

 (partim); Ashm., Canad. Ent. xxxv. 1903. 



(J. Labrum strongly rounded anteriorly, broadly truncate pos- 

 teriorly and connected with the basal portion by a narrow petiole. 

 Maxillae very broad at the base; maxillary palpi rather short and 

 very slender, first joint as long as or longer than the others; labial 

 palpi slender, second joint almost as long as first. Abdomen 

 flattened, the segments not constricted ; hypopygium usually 

 without an apical spine, blunt or emarginate. The second 

 recurrent nervure is received by the third cubital cell at some 

 distance from the base. 



Q. Tarsal ungues simple; fifth ventral segment punctured; 

 second abdominal segment usually with three transverse carinse; 



