264 Mr. R. B. Sharpe's Contributions to the 



Cymborhynchus macrorhynchus (Gm.). 



Cymborhynchus macrorhynchus, Salvad. /. c. p. 109 ; Sharpe, 

 Ibis, 1876, p. 49. 



Brunei [coll. Ussher) ; Moara Island [coll. Ussher) ; Lum- 

 bidan [coll. Ussher, Treacher) ; Lavvas river [coll. Treacher) . 



The series sent by Mr. Treacher effectually disposes of the 

 idea that the Bornean bird can be specifically separated from 

 the Malaccan. I have already shown (/. c.) that great varia- 

 tion in the number of white bars on the outer tail-feathers 

 exists in Malaccan birds. C. malaccensis, Salvad., is supposed 

 to differ from the Bornean Cymborhynchus in having three 

 outer tail-feathers marked with white, whereas in the latter 

 birds no trace of a white mark generally exists. In Mr. 

 Treacher's series the markings are as follows : — 



a. Lawas river. Three outer tail-feathers very largely 



marked with white. 



b. Lawas river. Two outer tail-feathers marked, the pen- 



ultimate one faintly, the outermost very distinctly. 



c. d. Lawas river. No white marks at all on the tail- 



feathers. 

 e. Lumbidan. Only a faint spot on the outer feather. 

 /. Lumbidan. No white mark at all on the tail-feathers. 



The native name is given by Mr. Treacher as ''Kaug- 

 kaug.'' 



Mr. Low writes: — "From the Bunang river. May 1876. 

 This species is found about the mouths of most rivers and 

 near sandy beaches; the nest overhangs the water. In this 

 nest was found the egg of some strange bird, in addition to 

 the eggs properly belonging to it.'' The'nest is a long purse- 

 like structure, the general material appearing to be dried 

 flags or grass, with an outside covering of fibre intermixed 

 with grass and a few leaves : its length is about 13"5 inches, 

 and its diameter about 5-5. The eggs are rich cream-colour, 

 mottled all over with dots and smudgy spots of reddish ; axis 

 1-2 inch, diam. 0"8. The strange egg alluded to by Mr. Low 

 measures as follows — axis 1"2 inch, diam. 0'8, — and is pale 

 bluish white. It may be a variety of the ordinary egg, or 

 perhaps that of some parasitic Cuckoo. 



