(79) 



53. Cacatua triton trobriandi Finsch. 

 Althongli this form is somewhat larger than C. t. mao-olopha, it is so much 

 smaller than typical triton that it mnst rank as a well defined subspecies, being 

 moreover confined to the island sonth-east of New Guinea. See Nov. ZooL. III. 

 p. 240, V. p. 531. We have now before us fifteen specimens from Fergnsson, 

 Trobriand, Woodlark, Sudest, Rossel, and St. Aignan Islands. 



The Genus NASITERNA. 



Eleven forms of this genus have hitherto been recognised, a twelfth has been 

 described by De Vis, the validity of which we cannot confirm, and a new one is 

 before ns, which will be described hereafter. The actual relation of these forms 

 to each other is perhaps not very easy to understand. N. bruij7ii and N. pygmaea 

 live in the same places and are doubtless totally different species. N. maforensis 

 and N. misoriensis are evidently subspecifically allied, and separable specifically 

 from all other forms. It would be quite hazardous to connect them with either 

 N. bruijni or N. pygmaea. N. jMsio, N. salvadorii (our new form) and N. heccarii 

 seem to be geographical representatives of one species. N. viridifrons seems to 

 stand alone in some respects, though it may be a representative of N. maforensis. 

 N. keiensis seems to be representing N. pygmaea. The Solomon Islands forms 

 are not j'et well represented in the Triug Museum, and we cannot therefore venture 

 to have even an idea about their affinities, though N. nanina seems to be very 

 much like the/etnale oi N.finscki. 



54. Nasiterna bruijni Salvad. 

 We have both sexes from Arfak (Bruijn's hunters), Kapaur (Doherty), Mt. 

 Owen Stanley, 5000 — 7000 feet (collector unknown), Eafa district, British New 

 Guinea (collector unknown) — altogether five specimens from Dutch and five from 

 British New Guinea. The latter are perhaps subspecifically separable, their outer 

 rectrices having apparently more often bright orange tips, instead of pale yellow 

 ones. If this or any other character should be found constant enough, the form 

 from British New Guinea would probably have to be called Nasiterna bruijni 

 orientaUs. It was described as Nasiterna orientalis n. s. by De Vis in the 

 Appendix to the Report on New Guinea for 1896 and 1897 (p. 81). At least we 

 believe that with his creating this N. oi-icntalis he meant to separate the British 

 New Guinea form from the typical one from the Berau Peninsula. His description, 

 however, does not, if we understand it right, state any real constant distinguishing 

 characters between the two supposed forms. 



55. Nasiterna pygmaea (Quoy et Gaim.). 



We have before us six specimens without exact localities, but mostly from 

 Bruijn's hunters. 



One Andai, purchased from a dealer. 



One Dorey (W. Doherty). 



Two Mysol (Powell coll., H. Kiihn coll.). 



Three Kapaur (W. Doherty coll.). 



This species is only known from the Beran Peninsula to Ka2)aur, and from 

 the Western Papuan Islands, namely Mysol, Salwatty, Waigiu, Guebeh, and 

 Koffiao. 



