726 OLDFIELD THOMAS. 



\Hipposideros diadema, Geoff. 



Q in al. Beaufort River. 

 Q in al. Kloof-bivak. 



7. Hipposideros tricuspidatus; Temm. 

 In al. XXII. Hollandia, N. New Guinea. 



S. Nyctophilus bifax, Thos. 



1 adult and 6 young in al. IV. Probably S. New Guinea. Coll. Hassan. 

 Quite Hke the Queensland N. bifax. Definite locality unfortunately lost. 



9. Pipistrellus papuanus, Pet. 



4 cf, n Ç. Frederik Hendrik Island, S. New Guinea. March 1910. 



(f. XXI. Hollandia, N. New Guinea. 



cf. XXIV. N. New Guinea. 



Q. Prauwen-bivak, Idenburg River. W. C. van Heurn. 28 Nov. 1920. 



10. Tylonycteris pachypus, Temm. 

 In al. IV. No definite locality. 



n. Scoteinus greyi, Gray. 



i çf , 4 Ç>. Frederik Hendrik Id., S. New Guinea. March 19 10. 



12. Leuconoe adversus, Horsf. 



2 çf, 1 Çj. In al. Frederik Hendrik Id., S. New Guinea. March. 1910. 



Thèse represent „ Vespertilio macropus, Gould", usually considered a synonym of L. 

 adversus. 



13. Emballonura raffrayaua, Dobs. 



2 in al. XVIII. XIX. Bivak Batoe, Doorman River. W. C. van Heurn. 



14. Emballonura papaana, Thos. 



cf in al. Pionier-bivak, Mamberamo River. W. C. van Heurn. 



Rattus. 



Mr. VAN HEURN's collection contains a considérable number of examples referable to 

 the genus Rattus, but curiously enough ail belong to one group, of which R. mordax is the 

 Papuan représentative, with semi-spinous fur, unicolor tail and 2 — 2 = 8 mammae. On the 

 other hand those of the Versteeg collection are ail referable to 7?. ringens, which lias a white- 

 tipped tail and 1 — 2 = 6 mammae. Nor are there any of the small species of the cphippium 

 group, whose représentatives in the New Guinea area are R. browni and R. gestri. 



Three forms would appear to occur in the Mamberamo area, one so like mordax that 

 I would only distînguish it as a subspecies, then one considerably larger, and again a third 

 still larger. Ail agrée in their gênerai proportions, and approximately in their colour, but 



