38 PEOCEEDIIirGS OF THE NATIONAL MUSEUM vol. 75 



According to the material in the United States National Museum, 

 three forms can be recognized from the islands off the west coast of 

 Sumatra, as follows: 



(1) Anthreptes malacensis pelloptilus Oberholser. 



Bill larger and heavier than 7nalacensis\ the iridescent purple of 

 the mantle more pronounced. Three males have the culmen, 18.5-19 

 (18.8). Simalur Island. 



(2) Anthreptes malacensis pollostus Oberholser. 



Hardly different from fnalacensis; appears to have less iridescent 

 purple on the mantle. Not a well-marked form. Culmen, 16-17.5 

 (16.8), Nias Island. 



(3) Anthi'eptes malacensis nasaeus Oberholser. 



More iridescent purple on the mantle than in inalacensis or 

 pollostus \ bill slightly larger and heavier. Culmen, 17-18.5 (17.7). 

 Mentawi Islands (Siberut, Sipora, North and South Pagi). 



ARACHNOTHERA LONGIROSTRA LONGIROSTRA (Latham) 



Certhia Iwigirostra Latham, Ind. Orn., vol. 1, 1790, p. 299 (Bengal, Sylhet). 

 Arachnothera longirostra exochra OsEaiHOLSER, Smiths. Misc. Coll., vol. 60, 



no. 7, 1912, p. 19 (South Pagi Island). 

 Arachnothera longirostra hypochra Obebholseb, Smiths. Misc. Coll., vol. 60, 



no. 7, 1912, p. 19 (North Pagi Island). 

 Arachnothera longirostra Chasen and Kloss, Ibis, 1926, p. 299. 



Five males, four females, and one unsexed bird, Siberut ; ten males, 

 three females, and one without sex, Sipora. 



There seems to be little or no difference in size between the series 

 from Siberut and Sipora and that from North and South Pagi 

 Islands, and the difference in color, if any, is negligible. A smjill 

 series from the mainland, north of Singapore, and two males from 

 east Sumatra seem to agree in size and color with the series from the 

 Mentawi Islands. A few specimens from near . Singapore average 

 smaller and represent a different form. It has been named Arachno- 

 thera I. heliocrita Oberholser.*^ 



Three specimens from Pulo Bankaru, Banjak Islands, have longer 

 bills, especially the type. It has been named Arachnothera longiros- 

 tra zarhina Oberholser.'*^ 



Two specimens from Nias Island are paler than any I have ex- 

 amined and the bills are longer than the average, but not quite as 



" Journ. Washington Acad. Sci., vol. 13, 1923, p. 227 

 « Smiths. Misc. Coll., vol. 60, no. 7. 1912, p. 19. 



