84 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 64. 



1916; Parigi, September 14-27, 1916; Toboli, October 17, 20, 1916; 

 Manilili, December 16 ; 1916 ; Dolo, December 26, 29, 1916 ; Koelawi, 

 February 7 and July 25, 1917; Rano Lindoe, March 5-21, 1917; 

 Gimpoe, August 9, 21, 1917 ; Doda, Besoa, October 23, 1917 ; Toewo 

 Mountain, Besoa, November 1, 1917; Napoe, Watoetaoe, December 

 4, 1917; Pinedapa, February 4 and 13, 1918. 



The most striking difference between Philippine and Celebes birds 

 is the longer and much heavier bill of the latter; if there were no 

 other differences this alone would be suflScient to differentiate the 

 two forms, but celebensis has a longer wing and when laid out in 

 series appears paler on the throat and upper surface. 



Interior of the mouth with the tongue, blacli in the adult and yellow in the 

 young, later becoming streaked with black. — H. C. R. 



165. ARTAMUS MONACHUS Bonaparte. 



Five males, Likoepang, January 16-February 25, 1916; one male, 

 Temboan, July 17, 1916 ; one male and one female, Toewo Mountain, 

 Besoa, November 4, 1917. 



Family FALCUNCULIDAE. 



THICKHEADS. 

 166. MUSCITREA SULFURIVENTRA (Walden). 



A good series of both sexes from : Goenoeng Kalabat, April 9, 10, 

 1916; Toemaratas, July 4-7, 1916; Koelawi, February 23, 1917; 

 Goenoeng Lehio, January 12-20, 1917; Eano Lindoe, March 14, 

 1917; Toewo Mountain, Besoa, October 26-November 4, 1917; Rano 

 Rano, December 9-31, 1917. 



In the above series only two males and three females are from the 

 extreme northern end of the island, the remainder are from the north- 

 central part. As a rule the birds from middle Celebes seem to be 

 paler, but right in the same locality with the paler specimens others 

 occur that can not be told from northern examples, so the differences 

 must be due more or less to individual variation and not to locality ; 

 there seems to be no difference in size. Meyer,^- however, has re- 

 corded Muscitrea meridionalis (Biittikofer) from central Celebes, but 

 gives no definite locality. 



An immature female, not long from the nest, taken at Rano Rano, 

 December 21, differs from the adult in having the head, back, flanks, 

 and a band across the chest strongly washed with mikado brown, 

 and only the under tail-coverts are yellow. 



The female differs from the male in being browner above, espe- 

 cially noticeable on the frons, lores, ear coverts, and edges of the 

 remiges, and has a slightly shorter wing. 



E2 Notes Leyden Mus., vol. 28, 1903, p. 189. 



