354 PROF. K. COLLETT ON BIRDS FROM [May 3, 



Length of wing 137 millim. ; length of tail 123 millim. 



To the descriptions of Mr. Gould (Handb. B. Austr. vol. ii. 

 p. 141) and Salvadori (Cat. B. Br. Mus. vol. xxi.) may be added, that 

 the feathers encircling the eye are whitish, and that the outer webs 

 of the primaries from 2nd to the 6th have metallic liislre. The 

 under wing-coverts are chocolate-brown. 



But few specimens of this species were observed, as a rale 

 single birds. They inhabited the broken sandstone ranges which- 

 are met with at the mouth of Victoria Eiver (a little to the south 

 of Arnhem Land). The preserved specimen was shot at Blunder 

 Bay, near the outlet of the river in Queeu's Channel. 



2. Petbophassa bufipennis, sp. nov. (Plate XXVIII.) 



Two specimens, adult males, from South Alligator Kiver, 19th 

 Jime, 1895. 



Length of wing .... a, 150 millim. ; 6, 152 millim. 

 „ ,. tail a, 146 „ b, 149 „ 



This species is easily distinguished from P. albipenuis by its 

 much greater size, by the chestnut primaries having black tips and 

 margins, by the pale grey centres to the feathers of the head and 

 neck, and by the whitish throat. 



Descr. Head and neciv greyish brown, each feather with whitish 

 centre ; throat yellowish white, unspotted. Lores black ; a 

 whitish narrow line above and below the eyelids. 



All the upper surface and chest rufous brown ; each feather 

 margined with rufous ; the centre of the feathers of the chest 

 greyish white. 



Abdomen and under tail-coverts (as in P. albijjennis) chocolate- 

 brown. No metallic spot on the upper wing-coverts, and on one 

 of the secondaries, as in that species. 



"Primaries chestnut-red, with the tips and outer web blackish, 

 the latter with a slight metallic lustre. The under wing-coverts 

 rufous brown, those of the primaries being more chestnut. 



Tail rufous brown on the upper surface, chocolate-brown (with 

 a slight bluish gloss) underneath. 



Bill and feet as in P. albipennis. 



Hab. This Pigeon was met with in flocks in the central portions 

 of Arnhem Land about the sources of the iSouth Alligator Eiver. 

 ^t inhabits the stony parts of the sandstone hills ; it lies close 

 amongst the stones, and knows well how to conceal itself amongst 

 them when wounded. 



3. Ptilopus (Leucotreron) alligator, sp. nov. (Plate XXIX.) 



Two specimens, male and female, from South Alligator Eiver, 

 15th June, 1895. 



Length of wing .... Male 184 millim. ; female 189 miUim. 

 „ „ tail „ 142 „ „ 141 „ 



Nearest to P. cinctus from Timor. It differs, however, in having 



