328 NEW ZEALAND AND AUSTRALIAN PARASITIC HYMENOPTERA, 



vein — the only vein present — brown. Head large, oblong and 

 slightly wider than the elongate thorax, nearly thrice as long as 

 wide, the sides being parallel. Thorax about once and one-half 

 as long as the head, rounded anteriorly and slightly narrowed 

 posteriorly, metathorax about as long as scutellum, mesonotum 

 and pronotum united. Abdomen conic-ovate, as long as the head 

 and thorax united and much wider than the thorax, with the 

 apical margins of dorsal segments 2-4 slightly sinuate medially. 



Type— No. 4870, U.S.N.M. 



Hob. — Rose Bay, near Sydney, N.S.W. 



Described from four Q specimens, bred by Mr. Froggatt, 

 March 6, 1892, from "hollow stem of Acacia discolor." The 

 species will be found to be parasitic on some wood-boring coleop- 

 terous larva inhabiting the stem. 



Genus Sierola, Cameron. 

 (2) Sierola antipoda, n.sp. 



Q. — Length 1-5 to 1*8 mm. Black, shining; scape brown, 

 tlagellum yellowish, shading off into brown at tip ; legs dark 

 brownish-piceous, all trochanters, anterior and middle tibia?, tips 

 of hind tibia? and all tarsi yellowish; wings hyaline, subcostal 

 vein, prostigma and stigma brown, the other veins pallid : one 

 closed discal cell and a closed marginal cell. 



Head oblong, fully twice as long as wide, minutely and 

 delicately shagreened, with some minute punctures scattered over 

 its surface. Pronotum trapezoidal, not short; mesonotum and 

 scutellum microscopically shagreened and united scarcely longer 

 than the pronotum; no parapsidal furrows; metanotum longer 

 than the mesonotum and scutellum united, shining; above 

 minutely delicately shagreened but without carina? except at the 

 lateral margins posteriorly. 



Type-No. 4871, U.S N.M. 



Bab. —Sydney, N.S.W. 



Host — Dipt.: Cecidomyia frauenfeldi, a species forming soft 

 red galls on Melaleuca (W. W. Froggatt). 



