260 MR. R. E. TURNER OX THE [Feb. 15, 



Rhagigaster unicolor Guer. st. lyelli, nom. n. 



Rhagigaster unicolor Guer. st. mandibulars Turn. Proc. Linn. 

 Soc. N.S.W. xxxii. p. 217 (1907) (nee R. mandibularis Westw.). 



S . The second cubital cell is only about three-fifths of the 

 length of the third on the radial nervure, whereas in typical 

 unicolor it is fully four-fifths of the length. 



It is possible that this may prove to be a sufficiently distinct 

 species, but I have not seen the two forms from the same 

 locality. 



A pair taken in copula by Mr. G. Lyell at Gisborne, Victoria, 

 in February. 



Rhagigaster fuscipennis Sin. 



Rhagigaster fuscipennis Sm. Descr. n. sp. Hym. p. 175 (1879), <3 

 (nee Turn. Proc. Linn. Soc. K.S.W. xxxii. p. 218, 1907). 



Rhagigaster gracilior Turn. Proc. Linn. Soc. N.S.W. xxxii. 

 p. 223(1907), c? ?. 



My identification of Smith's species was mistaken ; it is 

 therefore necessary to give a name to the species described by me 

 sis fuscipennis Sm. : — 



Rhagigaster nigritulus, nom. n. 



Rhagigaster fuscipennis Turn. Proc. Linn. Soc. N.S.W. xxxii. 

 p. 218 (i907), d $ (nee Smith). 



Rhagigaster analis Westw. 



Rhagigaster analis Westw. Arc. Ent. ii. p. 106 (1844), $ . 



Rhagigaster tristis Sm. Cat. Hym. B. M. vii. p. 63. n. 13 

 (1859), cf. 



Rhagigaster nitidus Sm. Cat. Hym. B. M. vii. p. 63. n. 16 

 (1859),'$. 



Several pairs taken in cop. by Mr. H. M. Giles in the neigh- 

 bourhood of Perth. The female is a true Rhagigaster, having 

 the lateral grooves on the head ; but the male is without the 

 frontal carina between the eyes which is usually present in males 

 of that group. This shows plainly that my genus Rhytidogaster 

 cannot stand, there being no sufficiently distinguishing points 

 between the males. In some of the males sent by Mr. Giles the 

 second recurrent nervure is interstitial with the second transverse 

 cubital nervure, and the size varies from 12 to 15 mm. 



Rhagigaster cinerellus, sp. n. 



S . Mandibles bidentate, the inner tooth veiy large ; clypeus 

 very short and broad, not produced in the middle, the anterior 

 margin almost straight, convex, with a carina from the base to the 

 middle, obliquely and very broadly triangularly depressed from 

 the middle to the apex, the margins of the oblique space and the 

 apical margin raised, forming low carina?. Antennae inserted low 

 down, on the sides of the clypeus, about as long as the thorax and 



