DUTCH BORNEO-EXPEDITION. 151 



taiu-forms, such as Calyptomena Hosei, Cyanops monticola, 

 Malacopteron kalulongae, Rhinornyias rujicrissa, Mesolophus 

 {Ruhigula) montis, Hemixus connectens, Staphidia Everetti, 

 Turdinulus exsul and others in the forests of Mount Kenepai 

 and Liang Koeboeng, and we may be quite sure now that 

 this special ornis of this more elevated zone of Borneo is 

 quite the same on all the mountains of the island, and 

 that these special forms are represented by closely allied 

 forms on the mountains of Malacca, Sumatra and Java. 



Falconldae. 



1. MicroJiierax fringillarius. 



Falco fringillaris Drap. Diet. Class. d'Hist. Nat. VI, p. 412, pi. V (1824). 

 Hierax coerulescens Salvad. Ucc. Born. p. 3. 

 Microhierax coerulescens Everett, L. B. Born. p. 185. 



Three specimens from Smitau, another from the Menda- 

 1am River (Dr. Nieuweuhuis) and another from the Upper 

 Mahakkam (Dr. Nieuwenhuis, winter 1898 — 99). — Iris, 

 bill and feet black. 



H a b. Malay Peninsula, Sumatra, Java and Borneo. 



2. Folioaetus ichthyaetus. 



Falco ichthyaetus Horsf. Trans. Linn. Soc. XIII, p. 136 (1822). 

 Poliaetus ichthyaetus Salvad. Ucc. Born. p. 6; Sharpe, Ibis 1889, p. 

 73; Everett, L. B. Born. p. 183. 



Two adult females from the Sibau River. — Iris chrome- 

 yellow, bill leaden blue, cere lemon yellow, inside of mouth 

 pale flesh-color, feet bluish gray. 



Hab. South-eastern Asia and the Sunda Islands (Celebes 

 included). 



Annotations of Mr. von Berchtold: »Ein gewandter und 

 scheuer Vogel. Sein Gesicht und Gehör sind sehr scharf, 

 der Flug leicht, doch wenn es sein muss, schnell, gewöhn- 

 lich aber langsam. Das schneckenförmige Steigen und das 

 Schweben ohne sichtbare Körperbewegung bietet ein schönes 

 Schauspiel. Den grössten Theil des Tages ruht er aufeinem 



Notes from th.e Ley den Aluseum, A^ol. XXI. 



