Aculeate Hymenaptera. 235 



gin ; two or three of the apical segments have a narrow 

 black band on their basal margin also ; the apical segment 

 is longitudinally striated; beneath, the apical margins 

 are fusco-ferruginous ; the terminal segment with a broad 

 lanceolate spine, which has at its base an acute angular 

 process on each side ; each band runs into a notch in the 

 middle. 



Hab. Champion Bay. 



In the British Museum. 



8. Tliymms subinterruptus. 



Male. Length 8 lines. Head and thorax black, and 

 variegated with yellow ; abdomen elongate, black, with 

 yellow fasciae. The clypeus, mandibles, orbits of the 

 eyes, interrupted at their summit, and a forked spot be- 

 tween the antennas, yellow; the clypeus with an oblique 

 dark line on each side, very faintly indicated. Thorax : 

 the anterior margin raised, a spot at its sides, a narrow 

 interrupted line a little before its posterior margin, the 

 tegulae, the post-scutellum, and a spot on the scutellum, 

 yellow; the apex of the posterior femora, a line beneath 

 them, and a spot on the intermediate femora beneath, 

 yellow ; the apex of the tarsal joints ferruginous ; the 

 wings hyaline, the nervures black. Abdomen : the base, 

 the apical segment, and the apical margins of all the 

 segments, black ; these marginal bands united by a 

 central longitudinal interrupted ferruginous line, the 

 marginal bands bordered by a narrow ferruginous stain ; 

 an oblong ferruginous spot on each segment towards its 

 lateral margins ; beneath, the abdomen has the margins 

 of the segments stained with ferruginous, also a central 

 ferruginous line which expands on each segment into an 

 angular shape. 



Hab. Champion Bay. 



In the British Museum. 



9. Thynnus (Agriomyia) irritans. 



Male. Length 7 1 lines. Orange-yellow: the flagellum, 

 and a quadrate shape on the vertex, enclosing the ocelli, 

 black. Thorax : the mesothorax black, with a quadrate 

 yellow spot on the disk, and a large irregular shape be- 

 neath the wings, orange-yellow ; the wings fuscous, the 



