THE BIRDS OF THE NATUNA ISLANDS 



43 



Doctor Abbott obtained the following two specimens from the 

 Natuna Islands: 



Adult female (type), U.S.N.M. No. 174684, Bimguran Island, 

 July 3, 1900. Length in flesh, 162 mm. 



Adult female, U.S.N.M. No. 174685, Pulo Lingung, near Bunguran 

 Island, June 17, 1900. "Feet livid purpHsh brown; bill and claws 

 black." Length in flesh, 210 mm. 



The latter has the sides of the crissum much shaded with gray, as 

 in Hemiprocne wallacei, though this color is darker and absent, or 

 nearlj^ so, on the middle feathers. Most of the specimens of the large 

 series of this species in the United States National Museum have 

 more or less gray on the lateral feathers of the lower tail coverts, 

 although this part is usually described as pure white. 



These two Natuna birds are in process of molting contour feathers, 

 wing qidlls, and tail feathers. Notwithstanding this, the measure- 

 ments given in Table 9 may be considered reliable. 



Table 9. — Measurements of specimens of Hemiprocne longipennis anochra 



' Measured in the flesh by the collector. ' Type. 



The 5 subspecies of Hemiprocne longipennis that seem to be recog- 

 nizable are as follows : 



1. Hemiprocne longipennis longipennis (Rafinesque). 



Hirundo longipennis Rafinesque, Bull. Sci. Soc. Philom., vol. 3, no. 68, ann^e 6, 



no. 8, p. 153, Oct., 1802. ("Java.") 

 Hirundo Klecho Horsfield, Trans. Linn. Soc. London, vol. 13, pt. 1, p. 143, 



May, 1821. ("Java.") 



Geographic distribution. — Java and Bali. 



2. Hemiprocne longipennis harterti Stresemann. 



Hemiprocne longipennis harterti Stresemann, Nov. Zool., vol. 20, no. 2, p. 339, 

 June 17, 1913. ("Deli, N. O. Sumatra.") 



Geographic distribution. — Borneo, Billiton, Banka, and Sumatra, 

 north to the island of Linga. 



3. Hemiprocne longipennis ocyptera Oberholser. 



Hemiprocne longipennis ocyptera Oberholser, Smithsonian Misc. Coll., vol. 60, 

 no. 7, p. 7, Oct. 26, 1912. ("Lafau, Nias Island.") 



Geographic distribution.- — Island of Nias, Barussan Islands, western 

 Sumatra. 



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