232 Mr. Frederick Smith on 



fuscous border extending to the base of the marginal 

 cell. Abdomen finely punctured, and having, in certain 

 lights, tints of blue ; thinly covered above with cinereous 

 downy pile. 



Hab. Champion Bay. 



In the British Museum. 



I have only seen two specimens of this fine addition to 

 the genus, one of which is in my own possession, presented 

 to me by Mr. H. Du Boulay. 



2. Tliynnus camiiamdaris, 



Male. Length 1 inch. Black : spotted and banded 

 with pale yellow markings. Head : the clypeus, a 

 V-shaped mark between the antennas, the mandibles and 

 orbits of the eyes interrupted at their summit, yellow ; 

 the cheeks with long thin cinereous pubescence, a simi- 

 lar short thin pubescence on the vertex. Thorax : an 

 interrupted line on the collar, two spots beneath the 

 wings, the coxse beneath, the metathorax with a reversed 

 bell-shaped spot in the middle extending its entire 

 length, the post-scutellum, two minute spots on the 

 scutellum and a spot on the tegulae, yellow ; wings hya- 

 line, nervures black. Abdomen : elongate, each seg- 

 ment vsdth an interrupted fascia in the middle, the fasciee 

 narrow, and slightly curved upwards at the lateral mar- 

 gins j beneath, the segments have an ovate spot on each 

 side, those on the second segment large and united, 

 almost occupying the entire segment ; the first segment 

 with a central triangular spot. 



Hab. Sydney. 



3. Thynnus ohlongus. 



Male. Length 10^ lines. Black. Head: the clypeus 

 and mandibles yellow, the latter bidentate, and black at 

 their apex ; a narrow red obscure line behind the eyes. 

 Thorax : rugose ; the disk with a short brown pubes- 

 cence ; beneath, the sides and the metathorax with a 

 cinereous pubescence ; tibite and tarsi ferruginous, the 

 apical joints of the latter black ; wings fulvo-hyaline, the 

 nervures fuscous. Abdomen elongate, finely punctured, 

 the basal margins of the segments smooth and shining. 



