A COLLECTION OF BIRDS FEOM N. E. SUMATRA. 81 



ARDEIDAE. 



23. Phoyx purpurea manillensis(Meyen). 



Eobinson and Kloss, p. 119; Hartert, p. 219. 

 $ Brastagi, Simeloengan, N. E. Sumatra, 21st June 



1916. 

 The- Eastern form of the Purple Heron is evidently much 

 commoner in Sumatra than it is in most other localities. 



24. Gorsachius melanolophus (Baffles). 



Eobinson, Journ. Federated Malav States Mus. II, p. 11 

 (1909); Buttikofer, Notes Leyden Mus. IX, p. 81 

 (188?). 

 9 imm. Toentoengan, Deli, X. E. Sumatra, 9th January 



1918 [No. 911]. 

 Wing, $ 265 mm. 



Probably not really very rare though its nocturnal and 

 skulking habits render it difficult to obtain. Very few speci- 

 mens have been collected in Sumatra. It is probably partially 

 migratory as specimens have been obtained at the Aroa Islands 

 a small group off the mouth of the Sungei Bokan Estuary. 



25. Butorides javanica(Horsf.). 



Hartert, p. 219. 

 $ Tandjong Morawa, Serdang, X. E. Sumatra, 27th 



February 1917 [No. 90]. - 

 Wing, $ 180 mm. 

 Usually common in Mangrove swamps. 



26. Ardetta cinnamomea(Gm.). 



Bobinson and Kloss, p. 120. 



5 $ , 2 Polonia, Deli, N. E. Sumatra, 27th April 1916— 



16th March 1917 [Nos. 26, 49, 54, 97, 151, 722]. 

 $ No exact locality, 21st August 1916. 



FALCONIDAE. 



27. Spizaetus limnaetus(Horsf.). 



Bobinson and Kloss, p. 122; Hartert, p. 195. 



4 $ , 2,1? Polonia, Deli, NT. E. Sumatra, 10th June — 

 10th March 1917 [Kos. 58, 60, 147, 173]. 



2 Mabar, Deli, N". E. Sumatra, 23rd March 1917 [No. 

 174]. 



Four of these birds are entirely black, being the stage 

 described as 8 p. limnaetus (Horsf.). Two are white beneath 

 with broad black stripes (Sp. caligatus Baffles) while one is 

 entirely buffy white beneath, being evidently quite immature.. 

 All however are certainly of one species. 



28. Spilornis bacha pallidus, Walden. 



Bobinson and Kloss, p. 122. 



Spilornis bacha sub sp., Hartert, p. 195. 



R. A. Soc, No. 80, 1919. 



