BY ROWLAND E. TURNER. 233 



bro^^denecl from the base. Abdominal segments densely covered 

 with elongate punctures. Pygidiura narrow and strongly deflexed 

 at the apex. Abdomen cylindrical. Length 7 mm. 

 Hab. — Macka}^, Q.((J9 i*^ cop.). 



R. BiDENS Sauss. 



Rhagigaster bidens Sauss., Reise d. Nov. Zool. ii. 1, Hym. p. 11 2, 

 n.3, 1867(^), 



Thynnus seraijeri D.T., Cat. Hym. viii. 113, 1897. 



Saussure's description of the male is sufiicieht. It is a much 

 smaller species tliMi jRhagigasier unicoloi' Guev., and of an opaque 

 black with subfuscous wings; the sculpture is also very different. 



2. Head rectangular, much longer than broad, deeply but 

 rather sparsely scul|)tured, not very much broader than the pi-o- 

 thorax. Prothorax narrowed anteriorly, as bro^d on the anterior 

 margin as long; mesothorax small, much narrowed posteriorl3\ 

 Median segment as long as the prothorax, broadened posteriorly 

 and obliquely truncate ; thorax and median segment rather 

 shallowly punctured. Abdomen cylindrical, thickly covered 

 with elongate punctures, which are deeper and larger on the 

 three basal than on the apical segments. Pygidium narrowly 

 truncate at the apex. Entirely castaneous. Length 10 mm. 



Hab— Sydney (Coll. Froggatt). 



R. CORNUTUS, n.sp. 



(J. Clypeus slightly emarginate at the apex, with a longitudinal 

 carina from the base, which terminates in the middle of the 

 clypeus in a very prominent acute tubercle. A V-shaped carina 

 between the antennae, but no transverse frontal carina. Front 

 strongly, occiput more finely punctured. Thorax strongly and 

 densely, median segment rather more finely punctured and 

 rounded posteriori}-. First abdominal segment with a median 

 sulca from the base not reaching the apex; segments 2-5 with a 

 strongly depressed line near the base, and the sides raised near 

 the apical margin forming an emarginate carina almost obsolete 



