•226 REVISION OF THE THVNNID.E OF AUSTRALIA, I., 



with a deep depression on each side close to the posterior margin; 

 median segment only slightly widened from the base to the apex. 

 Abdomen subcylindrical, shining, finely punctured, the first 

 segment vertically truncate at the base, without a tubercle at the 

 base beneath. Pygidium elongate, arcuate, simple, without 

 carinas and rounded at the apex. Shining black; the mandibles, 

 antennae, clypeus, a spot on each side between the eye and the 

 base of the antennae, and the legs, ferruginous; the pygidium 

 bright ferruginous-red. Length 11 ram. 



Smith mentions a shallow depression on each side of the median 

 segment, which is scarcely visible though the segment is slightly 

 higher in the middle. 



Bab. — Western Australia. 



R. REFLEXUS Sm. 



Rliagiyaster reflexus Sm., Cat. Hym. B.M. vii. p. 62, n.l2, 1851'. 



(J. Head very large, clypeus with a short A-shaped carina. 

 Lateral angles of the prothorax prominent. Epip3'o;ium strongly 

 rugulose, narrowh^ rounded at the apex. The second recurrent 

 nervure is interstitial with the second transverse cubital nervure. 

 Antennae short and stout. 



9- Unknown. 



Hab. — Swan River, \Y.A. 



R. OBTUSUS Sm. 



Rhagigaster obtusus Sm., Cat. Hym. B.M. vii. p.62, n.ll. 



(J. Clypeus with a short A-shaped carina at the base, a trans- 

 verse carina in front of the anterior ocellus, the piominenee 

 between the antennae rounded at the apex. Epipygiura broarlly 

 rounded at the apex. 



9. Uuknown. 



Hab. — A^delaide, S.A. 



R. LiEVIGATUS Sm. 

 A'Aaf/i^ai'i!e/'^reiu"^a<:?t6'Sm.,Descr.n.sp.Hym.p.l76,n.4, 1879((J9). 

 (j". The cl3-peus is carinated, the carina branching just below 

 the base into two, enclosing a triangular space, transversely 



