Mr. II. E. Turner on Fossorial Hymenoptera. 83 



Ni/sson [Acanthostethus) minimus, sp. n. 



S. i^^iger; mandibulis, scapo, flagello articulis tribus basalibus, 

 pronoto, tegulis, segmentis abdominalibus subtus, segraento 

 dorsali primo, nonnumquam nigro-maculato, segmentis 2-7 linea 

 transversa apicali, pedibusque ferrugineis ; segmentis dorsalibus 

 1-4 macula transversa utrinqiie ilava ; alls byalinis, veuis 

 fuscis. 



Long. 4-5 mm. 



S . Coarsely punctured, the abdomen very finely and 

 closely punctured, with large scattered punctures on the 

 basal segment and on the second ventral segment, dorsal 

 surface of the median segment as long as the scutellum, the 

 basal area iiregularly obliquely striated. Clypeus widely 

 emarginate at the apex, the angles of tlie emargination not 

 produced into distinct teeth. Ventral abdominal segments 

 2-4 with a fringe of long hairs at the apex, segments 3-5 

 with a spine at the apical angle on each side, seventh dorsal 

 segment witli three apical teeth, the middle one blunt and 

 broad. The apical joint of the flagellum is rather strongly 

 curved and hollowed beneath, longer than the penultimate. 

 Second recurrent nervure received by the first cubital cell 

 very near the apex ; second cubital cell small, with a short 

 petiole. 



Hab. Kurauda, N. Queensland (Dodd) (G. Turne?') ; 

 March. 



This is near confertus, but differs in the sculpture of the 

 median segment and the neuration. 



Nysson {Acanthostethus) mcerens, sp. n. 



c? . Is^iger ; mandibulis basi pedibusque ferrugineis ; antennis 

 fuscis apice ferrugineis ; tegulis f usco-ferrugineis ; segmentis 

 dorsalibus primo secundoque linea apicali brevi utrinque flava; 

 alis hyalinis, leviter int'uscatis ; segmento dorsali septimo apice 

 obtuse tridentato. 



Long. 6'5 mm. 



^ . Head and thorax coarsely punctured-rugose, abdomen 

 closely and rather shallowly punctured ; basal area of 

 median segment irregularly longitudinally striated, the 

 surface of the posterior truncation finely longitudinally 

 striated in the middle, rugose on the sides. Apical joint of 

 the flagellum conical, nearly twice as long as the penultimate. 

 Median segment much shorter in the middle than the 

 scutellum. Segments 3-5 with a distinct spine on each 

 side at the apical angles ; seventh dorsal segment broad, 



6* 



