ART. 4 BIRDS OF THE MENTAWI GROUP RILEY 37 



Allowing for the inequality of the various series, there does not 

 appear to be any appreciable difference in size among the races. 



LEPTOCOMA BRASILIANA HYPOLAMPIS (Oberholaer) 



Cinnyris brasiliana hypolampia Obehholseb, Smiths. Misc. Coll., vol. 60, no. 7, 



1912, p. 19 (South Pagi Island). 

 Leptocoma drasiliana brasiliana Chasbn and Kloss, Ibis, 1926, p. 298. 



Four males and one female, Sipora; one male and three females, 

 Siberut. 



There does not seem to be any constant difference between speci- 

 mens from the two above islands or from the Pagi Islands. Two 

 males from Java and two males from Singapore have noticeably 

 smaller bills. I am prepared to recognize three forms from the 

 islands off the west coast of Sumatra as follows : 



(1) LeptocoTna hrasiliana rwecyTwrKyncha (Oberholser). 



Similar to L. h. hrasiliana but bill much larger. Culmen 16-15. 

 Simalur Island. 



(2) Leptocoma hrasiliana oenopa (Oberholser). 



Similar to L. h. mecynorhyncha but bill smaller, though larger 

 than in L. b. hrasiliana, culmen, 14-15.5. 

 Nias Island. 



(3) Leptocoma hrasiliana hypolampis (Oberholser). 



Top of the head more coppery, less golden, and the rump with 

 less violet wash than in L. h. oenopa; there is no difference in size. 

 A poorly marked form hardly worthy of recognition. Mentawi 

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



ANTHREPTES MALACENSIS NASAEUS Oberholser 



Anthreptes nialaceusis nasaeus Obbbholseb, Smiths, Misc. Coll., vol. 60, no. 



7, 1912, p. 20 (Sikakap Strait, Pagi Ids.). 

 Anthreptes malacensis malacensis Chasen and Kloss, Ibis, 1926, p. 299. 



Nine adult males, four immature males, and four females, Siberut; 

 one adult male, one immature male, and one female, Sipora. 



The above material agrees in size and color with the small typical 

 series from the Pagi Islands. The Mentawi Islands form on the 

 average has a longer and heavier bill, and the iridescent purple 

 edges to the feathers of the mantle are more pronounced than in 

 Anthreptes malacensis malacensis. 



