18 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 42. 



and more uniform upper surface, the rump concolor with the back, 

 instead of paler; lighter, and much less brownish (more grayish) 

 lower parts. From Collocalia fuciphaga amechana it differs in its 

 darker, more blackish (less brownish), more uniform upper surface, 

 and lighter, less bro\\Tiish ventral surface. It is still more different 

 from Collocalia fuciphaga elapTira, by reason of its much smaller size; 

 much darker, less brownish, and more uniform upper surface; less 

 brownish under surface; and darker abdomen and crissum. Com- 

 pared with Collocalia fuciphaga capnitis it is much smaller, with upper 

 surface darker, more blackish (less brownish), and rump concolor 

 with back, lower parts less brownish, anteriorly rather hghter, and 

 posteriorly with less well-marked dusky shaft hues. Although on the 

 upper surface it is practically identical with Collocalia fuciphaga aero- 

 phila of Nias Island, it is easily separable by its decidedly paler and 

 much less bro^vnish lower parts. 



A satisfactory series of 15 specimens, collected by Dr. Edgar A. 

 Mearns on the islands of Mindanao, Mindoro, and Luzon, shows that 

 the birds of the Phihppine Islands are not identical with either the 

 Javan race {Collocalia fuciphaga fuciphaga) or the birds of the islands 

 in the Pacific Ocean farther eastward, as the writer formerly supposed,^ 

 but have well-marked characters of their own, as above set forth. 

 Some of the individuals of this series are more brownish both above 

 and below than the average, but as a whole they are very uniform in 

 color. It is noticeable that there is considerable variation in meas- 

 urements. 



Measurements of specimens of Collocalia fuciphaga mearnsi. 





Sex. 



Locality. 



Date. 



Collector. 



191447 

 208354 



208353 

 208348 



208351 

 201920 



201922 

 190172 

 201921 



208350 

 208355 



208352 

 208570 

 208356* 



Male. 

 ...do.. 



..do. 

 ..do. 



Mercedes, Mindanao Island, 

 Philippine Islands. 



Haights - in - the - Oaks (near 

 I'aoaj'), Bonfniet, Luzon Is- 

 land, I'hilippine Islands. 



do 



Dec. 19,1903 

 July 25,1907 



..do. 



Female. 

 ...do.... 



...do.... 

 ...do.... 



...do. 

 ...do. 

 ...do. 



Bafniio, Benguet, Luzon Island, 

 I'hilippine Islands. 



do 



Bucna Vista (Mangyan clear- 

 ing), Mindoro Island, Philip- 

 pine Islands. 



Manay, Mindanao Island, Phil- 

 ippine Islands. 



Pantar, Mindanao Island, Phil- 

 ippine Islands. 



Mangyan clonrinfr, .\loag River, 

 Mindoro Island, Philippine 

 Lslands. 



Bagnio, Benguet, Luzon Is- 

 land, Philippine Islands. 



Ilaights-in-the-Oaks, Benguet, 

 Luzon Island, Philippine 

 Islands. 



do 



do 



do 



do 



Apr. 30,1907 



July 12,1907 

 Nov. 5, 1906 



Oct. 6,1906 

 Aug. 13,1903 

 Nov. 10,1906 



May 9, 1907 

 July 25,1907 



-do. 



Dr. E. A. Mearns 

 do 



.do 



.do 



.do. 

 -do. 



...do. 

 ...do. 

 ...do. 



....do. 

 ....do. 



mm. 

 114.0 



109.0 

 112.0 



112.5 

 106.0 



108.5 

 108.0 

 107.0 



115.0 



July 26,1907 

 July 28,1907 



-do 112.0 



-do 113.0 



-do 113.0 



mm 

 50.0 



52.0 



50.5 

 52.0 



51.5 

 46.5 



45.0 

 48.0 

 46.0 



60.0 

 47.0 



51.0 

 50.0 

 50.0 



mm. 

 5.0 



4.0 

 4.0 



4.5 

 3.6 



4.0 

 4.5 

 3.5 



3.8 



4.0 

 4.1 

 3.5 



mm. 

 10.0 



9.0 

 9.0 



9.6 

 9.3 



8.5 

 9.1 



9.0 

 9.0 



9.0 

 8.7 

 9.1 



» Proc. Acad. Nat. Sci. Phila., July 26, 1906, pp. 186-187. 



'Type. 



