the Gemis Pison. 295 



Hab. — Australia (Champion Bay) . 

 In the British Museum. 



This species is like P. 8pinolce, but is separated from 

 it by its punctured mesothorax and fuscous wings. 



29. Pison dec'ipiens, n. sp. 



Male. Length 3 lines. Black, the legs red. 



Head: the tips of the mandibles, the four basal joints 

 of the antennse, and the legs, ferruginous; the apical 

 margins of the segments of the abdomen rufo-testaceous ; 

 the pul villus of the claw-joints of the legs black; the 

 second joint of the antennae black at the base, and the 

 fourth joint more or less black above ; the face covered 

 with silvery pubescence as high as the emargination of 

 the eyes ; the clypeus with an acute tooth in the middle 

 of its anterior margin ; the cheeks silvery. Thorax very 

 closely and rather finely punctured, the mesothorax 

 shining above; the metathorax with a central channel, 

 semi-opaque, and with a little silvery pubescence at 

 the sides and behind ; the wings subhyaline and irides- 

 cent, the nervures black, slightly clouded at their apical 

 margins. Abdomen : very closely and finely punctured, 

 slightly shining; the apical margin with silvery fasciaa 

 above ; beneath shining. 



Hah. — Australia (Champion Bay). 



In the British Museum. 



This species has precisely the aspect of a Tachytes. 



30. Pison dimidiatus, n. sp. 



Male. Length 2| lines. Head and thorax black, ab- 

 domen red. 



Head : clothed as high as the insertion of the antennas 

 with silvery pubescence, above which, nearly as high as 

 the anterior ocellus, it has a golden lustre ; the mandibles, 

 and scape of the antennae beneath, ferruginous, as are 

 also two or three of the basal joints of the flagellum. 

 Thorax : the mesotHorax and scutellum closely and finely 

 punctured; the metathorax punctured above, coarsely 

 so behind ; the collar and sides of the metathorax with 

 silvery pubescence; the tegulee and legs ferruginous, 

 with the anterior coxee black ; wings subhyaline, irides- 

 cent, with the nervures black. Abdomen ferruginous, 



