260 REVISION OF THE THYNNID.E OF AUSTRALIA, I., 



/>-. Strongly punctured, mandibles simple. E. tenuipalpa, n.sp. 



B. Median segment about the same length as the prothorax. 



a. Front between the antenna? deeply emarginate. E. parca, n.sp. 



E. DISPAR Westw. 



Uirone dispar Westw., Ai-c.Eiit.ii.2,p.l44,t.82,f ,5-6,1844 (^^9). 



? Thynyius {Ayriomyia) brevlGor'niH Sm,, Cat. Hym. B. M. vii. 

 p.:39, 11.103, i859(^). 



The female of this species has the mandibles bidentate. In 

 other nearly related species the mandibles are simple. West wood 

 gives full details as to the mouth-parts in his plates and in his 

 generic description. Thynaus brevicornis Sm., is almost certainly 

 a synonym, but the type seems to be lost and the description is 

 not sufficiently full for absolute certainty. 



Hah. — Adelaide, S.A. 



E. TENUIPALPA, n.sp. 



^. Head transverse, slightly narrowed posteriori}^; elypeus 

 densel}' and finely punctured, smooth on the apical margin, not 

 much advanced. Head and thorax strongly punctured; prothorax 

 very long, the anterior margin slightly elevated at the sides, 

 slightly emarginate in the middle. Median segment with a fine 

 median carina from the base to the centre, a smooth area at the 

 base, the remainder finely transversely rugulose, smooth at the 

 extreme apex. Abdomen fusiform, the first segment with a 

 median longitudinal sulca not reaching the apex, sabtuberculate 

 beneath at the base. Segments 2-4 with an impressed transverse 

 line near the base, and slight lateral elevations near the apical 

 margin. All the segments densely punctured, almost smooth at 

 the base. Hypopygium rounded, ciliated at the apex. Black, 

 the abdomen shining, mandibles fusco-ferruginous. Wings 

 hyaline, faintly iridescent, a fuscous cloud in the radial and 

 second cubital cells, nervures black. Length 12 mm. 



9. Head rectangular, slightly rounded at the posterior angles, 

 longer tlian bro:id, with a faint median frontal sulca. Head, 

 thorax and median segment punctured, the punctures large and 



