OF NEW ZEALAND. 105 



Sub-Family — CuABEONiNiE. 



Genus-RHOPALUM. 

 Kir by. 

 Three ocelli in a triangle ; radial cell with an open appendage. 

 Coxae of the posterior legs much shorter than the femora; the 

 posterior tibiae long and armed with strong spines ; tarsi simple. 

 Antennae of the male filiform, apparently thirteen-jointed ; the third, 

 fourth, fifth, and sixth long, strongly notched at the base, toothed at 

 the extremity. 



R. CARBONARiA. Smith, Cat. Hymen. Brit. Mus., Pt. IV,, p. 424 

 (1856) ; Trans. Ent. Soc, 1876, pi. IV., /. 7. 



Female. Black : the head and thorax slightly shining ; the 

 clypeus covered with silvery pubescence. Thorax : the lateral angles 

 of the collar produced and acutely margined ; at the sides, imme- 

 diately beneath the raised margin, is a f ossulet ; the collar above has 

 sometimes two slightly raised tubercles ; the mesothorax smooth, with 

 an abbreviated impressed line on each side, rather before the tegulae ; 

 the impressed line at the margins of the scutellum simple, that at the 

 base of the metathorax consute ; the metathorax smooth and shining, 

 with a deeply impressed line down the centre, which expands into a 

 broad f ossulet at the apex ; at the sides a little griseous pubescence ; 

 the wings hyaline, the nervures ferruginous, the costal nervure black ; 

 the tegulae testaceous; the apical joints of the tarsi testaceous. 

 Abdomen highly polished, smooth and shining ; the fourth segment 

 pubescent ; its apical margin fuscous ; the apical segment punctured 

 and sprinkled with pale hairs, its margins raised. 



Length, 6 lines. 



R. PERFORATOR. Smith, Trans. Ent. Soc, 1876, p. 483. 



Female. Black and shining, the legs variegated with yellow. 

 Head very closely and finely punctured ; an impressed line runs 

 from the anterior ocellus to the antennae ; the clypeus covered 

 with bright silvery pubescence ; the mandibles and scape of the 

 antennae yellow, the latter sometimes with more or less of black 

 behind. Thorax closely and very finely punctured; the metathorax 

 with a deep longitudinal central channel; the enclosed triangular 

 space at its base impunctate ; the sjiace beyond smooth, and with only 

 a few very delicate punctures ; just above the insertion of the 

 abdomen a few transverse striae ; the sides with a little silvery-white 

 pubescence ; wings sub-hyaline, darkest towards their apex ; the post- 

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