On a Collection of Birds 



from 



N. E. Sumatra. 



By 



H. C. Robinson, c.m.z.s., m.b.o.u. 

 and 



C. BODEN KLOSS, F.Z.S., M.B.O.U. 



Heer A. C. F. A. van Heyst, a Dutch gentleman engaged in 

 planting in the Deli District, N. E. Sumatra, has recently entrust- 

 ed us with a collection of birds made by him in that and neigh- 

 bouring districts. The collection is so large that it merits listing 

 in detail, and we therefore have prepared the following account of 

 it. 



The literature dealing with the area is fairly considerable, 

 but to economize space we have only quoted the list given by 

 Hartert (Novitates Zoologies, IX, pp. 194-220 (1902), and 

 our own paper on the avifauna of Korinchi where a more detailed 

 synonymy will be found (Journ. Fed. Malay Museums, vol. VIII, 

 part II, 1918). 



We have had occasion to describe four new forms in this paper, 

 viz., 



Macropygia ruficeps sumatranus. 



Brachylophus chlorolophus vanheysti. 



Cyornis vanheysti. 



Buchanga leucophaea batakensis. 

 while four species which have not hitherto been recorded from 

 Sumatra, 



Collocalia linchi cyanoptila, Oberholser. 



Collocalia innominata, Hume. 



Geocichla citrina citrina (Lath.). 



Machaeramphus alcinus, Westerm. 



were also obtained by Heer van Heyst who has supplied the 

 following account of the various localities whence his collection 

 was derived. 



Ldboean Deli. On the coast with the ordinary mangrove 

 forest. 



Polonia Estate, Deli. A tobacco estate in flat country not 

 exceeding 20 metres (65 ft.) in altitude. Large fallows overgrown 

 with lalang or secondary jungle. When in July the tobacco crop 

 has been gathered, rice is grown on the fields until March. After 

 that the land lies fallow for seven or eight years. The secondary 

 jungle attains a height of about 24 feet and is very thick. There 



Jour. Straits Branch R. A. Soc, No. 80, 1919. 



