Hymenoptera in the British Museum. 59 



distinct spine on each side at the basal angles, narrowly rounded at 

 the apex. Maxillae with a few long hairs at the base beneath. 

 Wings sparsely clothed with very short hairs, third abscissa of the 

 radius much longer than the second, first recurrent nervure received 

 a little beyond two-thirds from the base of the second cubital cell, 

 second a little before one-third from the base of the second cubital 

 cell. 



$, Mandibles acute at the apex; clypeus punctured, without a 

 carina, truncate at the apex. Front with a large concave area on 

 each side touching the inner margin of the eye and extending nearly 

 to the vertex, smooth and shining ; the ridge between the depressions 

 not quite as wide as one of them, smooth and shining, with a median 

 longitudinal sulcus and with a few punctures on the sides; vertex 

 shining, with a few scattered punctures. Head nearly twice as 

 broad as long, rounded at the posterior angles. Pronotum broader 

 than the head, the anterior margin straight, slightly narrowed 

 posteriorly, the hind margin broadly arched, twice as broad anteriorly 

 as long, shallowly punctured, with a few large setigerous punctures 

 on the anterior margin. Scutellum smooth and shining, broadly 

 truncate at the apex; postscutellum plainly visible, transverse. 

 Median segment very short, the dorsal surface scarcely half as loijg 

 as the scutellum, widened from the base, almost vertically truncate 

 posteriorly, the dorsal surface smooth and shining, the face of the 

 trancation microscopically punctured. Dorsal surface of the 

 abdomen shining, with a few scattered punctures; first segment 

 almost vertically truncate anteriorly, with a deep groove close to the 

 apical margin and a few indistinct, short, transverse striae close to 

 the apical angles ; second segment with numerous transverse striae, 

 which gradually increase in height from the base to the apex, the 

 basal striae strongly curved, those at the apex straight. Ventral 

 segments coarsely, but not very closely, punctured; the fifth seg- 

 ment coarsely longitudinally striated. Pygidium narrow, trans- 

 versely striated at the base, vertically truncate posteriorly, strongly 

 compressed before the tnmcation, the dorsal plate of the truncation 

 narrowly rounded at the base, broadly rounded at the apex, with 

 about ten arched striae, longer than the greatest breadth, scarcely 

 reaching beyond the middle of the tnmcation; the ventral plate 

 rather broadly truncate at the apex, finely, but distinctly serrate 

 at the sides. Basal joint of intermediate tarsi rather broad, with six 

 stout spines on the outer margin. 



Hab. Queensland, Stradbroke Island, Moreton Bay 

 {H. Hacker), September 17, 1915. 

 This is intermediate between Thynnus and Zaspilo- 



