314 HYMENOPTERA. 



4. PlSON REGALIS. PI. VIII. fig. 3. B.M. 



Pison regalis, Smith, Trans. Ent. Soc. New Ser. ii. 34. t. 8. f. 9 $ . 

 Hab. North China (Ning-po-foo). 



5. PISON XANTHOPUS. B.M. 



Nephridia xanthopus, Brulle, Ann. Soc. Ent. Fr. ii. 403. 

 Pison xanthopus, Shuck. Trans. Ent. Soc. ii. 75. 2. 

 Pison obscurus, Shuck. Trans. Ent. Soc. ii. 75. 3 (var.). 



Hab. Cape of Good Hope. 



6. PISON AURATUS. 



Pison auratus, Shuck. Trans. Ent. Soc. ii. 78. 4 $ . 

 Hab. Cape of Good Hope. (Type in Coll. F. Smith.) 



7. PlSON ARGENTATUS. B.M. 



Pison (Pisonitus) argentatus, Shuck. Trans. Ent. Soc. ii. 79. 9 $ . 

 Hab. The Mauritius. 



8. PISON MARGINATUS. B.M. 



Female. Length 5 lines. Black : the head opake, the face 

 with silvery pubescence. The mesothorax and scutellum slightly 

 shining, closely punctured; the metathorax obliquely rugose, 

 the central channel without a carina, the truncation transversely 

 rugose ; the wings subhyaline, darkest towards their apical mar- 

 gins ; the nervures testaceous, the outer margin of the tegulae 

 pale, the costal nervure fuscous; the two recurrent nervures 

 uniting with the nervures of the petiolated second submarginal 

 cell. Abdomen thinly covered with cinereous pubescence, very 

 finely punctured, the apical margins of the segments pale testa- 

 ceous. 



Hab. Australia (Hunter River). 



9. PISON PERPLEXUS. B.M. 



Male. Length 5 lines. Black : the face thinly covered with 

 silvery pubescence ; the mesothorax and scutellum very closely 

 and finely punctured; the metathorax rugose, indistinctly ob- 

 liquely so, the central channel with a carina which terminates a 

 little before the verge of the truncation, the latter transversely 

 coarsely sulcate, and having a central deeply impressed line ; the 

 wings hyaline, their apical margins with a fuscous border ; the 

 nervures testaceous, the costal nervure fuscous, the two recurrent 

 nervures received by the second submarginal cell distinctly within. 



