16 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 42. 



Measurements.— Wing, 111-118 (average, 114.1) mm.; tail, 48-52 

 (50.5); exposed culmen, 4-5 (4.6); tarsus, 9-9.5 (9.1). 



Type-locality. — Sumatra. 



.Geographical distrihution.—Sumsitra,, Simalur Island, and the south- 

 em part of the Malay Peninsula. 



This subspecies may be distinguished from Collocalia fuciphaga 

 amecJiana by its darker, more blackish (less brownish) upper parts, 

 and its dark rump, uniform in color with the back. From Collocalia 

 fuciphaga elapTira, its smaller size, darker, less brownish, more uni- 

 form upper surface (the rump concolor with the back), and its darker 

 posterior ventral surface separate it easily. It is decidedly smaller 

 than Collocalia fuciphaga capnitis, and darker, more blackish above, 

 with less of greenish gloss; the rump is not at all paler than the back; 

 the lower parts are rather more brownish, with much less conspicuous 

 shaft-streaks posteriorly. 



The names for the present race and their application were discussed 

 in my previous paper. ^ 



No specimens from either Borneo or the Natuna Islands have been 

 available, and the form of this species occurring in these locahties is 

 therefore in doubt. 



COLLOCALIA FUCIPHAGA AEROPHILA, new subspecies. 



Chars, subsp. — Similar to Collocalia fuciphaga vestita, but lower 

 parts much darker, somewhat more grayish (less brownish); upper 

 surface darker, more blackish (less brownish). 



Description. — ^Type, adult male, No. 179737, U.S.N.M.; Siaba Bay, 

 Nias Island, western coast of Sumatra, March 16, 1903; Dr. W. L. 

 Abbott. Upper parts blackish clove brown, with a slight greenish 

 gloss; wings and tail brownish black with greenish or violet reflec- 

 tions, the inner edges of the feathers dull brouTi; lores clove brown, 

 the bases of the feathers pure white; cheeks, auriculars, and sides of 

 neck deep smoky brown; lower surface deep grayish hair brown; 

 Iming of wing clove browni. 



Measurements {of type).— Wing, 114.5 mm.; tail, 54; exposed 

 culmen, 4.5; tarsus, 8. 



> Proc. Acad. Nat. Sci. Phila., July 26, 1906, p. 187. 



