54 PROCEEDINGS OF THE NATIONAL MUSEUM, vol.64. 



lighter, the vermiculations on the back finer and the tail-bars above narrower. 

 P'rom the latter it is much closer in color and forms a connecting link ; the 

 chief difference is the unbarred belly. 



Caprimulgus affinis mindanensis Mearns " is a dark bird like true affinis 

 but with finer vermiculations above and with the belly barred, with which 

 the present form hardly needs comparison. It seems strange that the Celebes 

 bird should resemble the one from Luzon rather than that from Mindanao. 



Since writing the above, I have reexamined the above forms but 

 can add little to the published descriptions. The only resemblance 

 between CapHmulgus affmis afinis and Caprimulgus affinis pro- 

 pinquus is the unbarred belly in the two forms. 



113. CAPRIMULGUS CELEBENSIS Grant. 



One male, Soemalata, September 6, 1914; one male, Kwandang, 

 October 25, 1914. 



The character of the length of the rictal bristles relied upon by 

 Ogilvie-Grant to separate this from all other species of Caprimulgus 

 does not hold true; they are just as long and heavy in C. macrurus 

 macruims and in C, manilensis. The present species resembles 

 G. m/milensis very much, the chief difference being that in the latter 

 the white tip to the outer tail-feather does not extend across the 

 outer web. I agree with Meyer and Wiglesworth ^^ that both will 

 eventually only be ranked as forms of C. macimrus^ as has been done 

 by Hartert ^^ but not by Oberholser.^ 



Family HEMIPROCNIDAE. 



TREE SWIFTS. 

 114. HEMIPROCNE WALLACEI (Gould). 



One male, Likoepang, January 13, 1916. 



Family MICROPODIDAE. 



SWIFTS. 

 115. COLLOCAUA ESCULENTA ESCULENTA (Linnaeus). 



One male and two females, Goenoeng Kalabat, April 9, 1916; one 

 male, Koeala Prang, June 5, 1916; two males and two females, 

 Toewo Mountain, Besoa, October 31, 1917. 



The male from Koeala Prang (No. 249748) has the light spot at 

 the base of the outer tail feather on the inner web much restricted 

 and gray like the outer web (seen from below), only showing whitish 

 along the shaft; on the next two feathers the white is more pro- 

 nounced. It differs also from the other males as follows: the 

 primaries and their coverts are largely dusky slate- violet ; the wing- 



» Proc. U. S. Nat. Mus., vol. 48, 1915, pp. 587-590. 

 " Proc. Biol. Soc. Wash., vol. 18, 1905, p. 85. 

 •8 Birds of Celebes, vol. 1, 1898, p. 321. 

 " Nov. Zool., vol. 13, 1906, p. 296. 



