r 
LARGE-TAILED NIGHTJAR. 
Rossornis macrurus salvadorii (Sliarpe). 
Labnan, Borneo. 
Rossornis macrurus ambiguus (Hartert). 
Tenasserim, Burmab, etc. 
Rossornis macrurus himaculatus (Peale). 
Malay Peninsula, and Singapore Island, 
Sumatra. 
Rossornis macrurus albonotatus (TickeU). 
North-eastern India. 
Rossornis macrurus nipalensis (Hartert). 
Nepal. 
Rossornis macrurus atripennis (Jerdon). 
Eastern Ghauts, Southern India. 
Rossornis macrurus arumsis (Mathews). 
Aru Islands. 
Rossornis macrurus Tceatsi (Mathews). 
Northern Territory. 
Rossornis macrurus rogersi (Mathews). 
Melville Island, Northern Territory. 
Rossornis macrurus yorki (Mathews). 
Cape York, North Queensland. 
Rossornis macrurus coincidens (Mathews). 
Cairns, North Queensland. 
Rossornis macrurus subsp. 
New Guinea. 
Rossornis macrurus subsp. 
New Britain. 
From Oberholser’s and my own investigations it seems certain that this 
bird shows an extraordinary number of subspecific forms and consequently 
at least four will hereafter be determined in New Guinea alone. It may be 
possible to run the continental forms along in series where their distribution 
is continuous, but island forms rarely take on a great similarity to the nearest 
geographical form but have more resemblance to a distant race. This was 
pointed out by Oberholser, and I have found it to be the case, working with 
a series of birds generally acting as a complement to his. 
While the preceding account was in the press Rothschild and Hartert 
have published in the Novit. Zool., Vol. XXV., May 1st, 1918, pp. 321 el seq. 
an account of this species. Their review is a striking example of the verification 
of subspecies when independent work is undertaken and no prejudice is allowed 
243 
