FOSSORIAL WASPS, 601 



10. PiSON (PiSONOIDES) ABERRANS Turn. 



Pison (Parapison) aberrans Tarn. Proc. Zool. Soc. London, 

 p. 519(1908), S. 



This little species differs from tenebrosum in the pale yellowish 

 colour of the tarsi, in the deeper longitudinal depression on the 

 dorsal surface of the median segment, and in the strongly iri- 

 descent wings. The cubital margin of the second cubital cell is 

 very short, scarcely more than half as long as the first transverse 

 cubital nervure. 



Hab. Mackay, Q. (Tii7'ner), January. 



11. PisoN (PisoNOiDEs) EXCLUSUM Turn. 



Pison (Parapison) exclusum Turn. Ann. k Mag. Nat. Hist. (8) 

 xviii. p. 127 (1916), <3 . 



Parapison frenchi Cam. MS., 2- 



This is a robust species, differing much from other Australian 

 species of Parapison, and resembling Pison vestitus Sm., though 

 differing constantly in the absence of the small, pptiolate, second 

 cubital cell. The female was taken in Victoria capturing spiders 

 on orange-trees. 



Hab. Brisbane, Q. {Uacher), ISTovember ; Horsham, Victoria 

 {Davey), July. 



12. Pison melanocephalum Turn. 



Pison melanocephalimi Turn. Proc. Zool. Soc. London, p 515 

 (1908),$. 



This very distinct little species cannot be confused with any 

 other, owing to the remarkable colouring ; but it is also distin- 

 guished by the very close approach of the eyes at the base of the 

 clypeus, where they are separated by a distance only a little moi-e 

 than half as great as that separating them on the vertex, and by 

 the very large facets of the eyes in front. The petiolate second 

 cubital cell is very small, and the first recurrent nervure is 

 received far before the apex of the first cubital cell, as in 

 Pisonoides pertinax and erythrocerus, to which the relationship 

 seems closer than to typical Pison. It is best regarded as a link 

 between the Pisonoides and Pisonitus groups. 



Hah. Cairns, Q. (Turner), February. 



13. Pison ignavum Turn. 



Pison ignavum Turn. Proc. Zool. Soc. London, p. 511 (1908), 5 . 



This belongs to Shuckard's subgenus Pisonitus, the second 

 i-ecurrent nervure being received at the middle of the second 

 cubital cell. I look on it as the Australian subspecies of the wide- 

 ranging P. argentatum Shuck., differing from the typical Mauri- 

 tius form in the mucli stronger sculpture of the median segment. 



Hah. Mackay, Q. (Turner), December to April; Kuranda, Q. 

 (^Wjier), January to March; Ravawai, Fiji ( Fez'teA), November 

 and December. 



Proc. Zool. Soc— 1916, No. XLII, 42 



