166 TJ.S. NATIONAL MUSEUM BULLETIN 221 



Caprimulgus niacrurus mesophanis Oberholser 

 Proc. U.S. Nat. Mus. 48: 590, May 3, 1915. 

 178092, Adult male. Amboina (Ambon) Island, Molucca Islands, Banda 

 Sea. June 12, 1897. Collected by — Schadler. Original number 36. 

 Caprimulgus affinis inindaiiensis Mearns 



Proc. Biol. Soc. Washington 18: 85, February 21, 1905. 

 190596. Adult male. Malabang, Lanao Province, Mindanao Island, 

 Philippine Islands. October 18, 1903. Collected by Edgar A. Mearns. 

 Original number 13071. 



Caprimulgus alBnis propinquus Riley 



Proc. Biol. Soc. Washington 31 : 155, December 30, 1918. 

 250197. Adult male. Parigi (on the Gulf of Tomini at the extreme base 

 of the Menado Peninsula), Celebes. September 28, 1916. Collected 

 by Harry C. Raven. Original number 3175. 



Caprimulgus mirificus Oberholser 



Smithsonian Misc. Coll. 60(7) : 7, October 26, 1912. 

 =Caprimulgus concretus Bonaparte. See Peters, Checklist of birds of the 



world 4: 214, 1940. 

 181230. Adult male. Siak River, east-central Sumatra. December 22, 



1906. Collected by William L. Abbott. 



Genus HYDROPSALIS Wagler 



H[ydropsalis]. trifurcatus "Natt. Nro. 779" von Tschudi 



Untersuchungen iiber die Fauna Peruana, Ornithologie, p. 129, 1845. 

 =Hydropsalis climacocerca climacocerca (von Tschudi). See Hartert, 

 Catalogue of the birds in the British Museum 16: 600, 1892; Peters, 

 Checklist of birds of the world 4: 218, 1940. 

 34989. Adult male. Cataracts of the Rio Madeira, State of Mato Grosso, 

 Brazil. September 11, 1829. Collected by Johann Natterer. Original 

 number 779 (first written 799, but corrected by a later hand to 779). 

 Received from the Naturhistorisches Museum, Vienna. 

 If von Tschudi's description of this form was wholly based upon Natterer's 

 MS., the latter's series of 11 birds must be considered the types. 



If, on the other hand, von Tschudi had before him Peruvian specimens, 

 as is implied by the fact that he described H. trifurcatus in a work on the 

 Peruvian fauna, his own birds would of course be the types, despite his use 

 of Natterer's name (until then a nomen nudum) . 



Inasmuch as von Tschudi evidently believed H. trifurcatus to be quite 

 distinct from his Caprimulgus climacocercus (fully described on p. 128), it 

 would seem that he was indeed writing, under trifurcatus, of a non-Peruvian 

 form, and I therefore adopt the point of view first mentioned above. 



Whether trifurcatus is properly synonymized with climacocerca can only 

 be decided after comparison with topotypical material of the latter. If the 



