ART. 16. BIRDS FROM NORTH CELEBES RILEY. 61 



A female from Likoepang (No. 249137) has about half the lower 

 mandible from the tip and tlie tip of the maxilla, horn color, but 

 this is an indication that the bird is not fully adult. 



Local name Koeng Koeng. — H. C. R. 



126. PYRRHOCENTOR CELEBENSIS RUFESCENS Meyer and Wiglesworth. 



One male, Laboea Sore, November 21, 1916; one male and one 

 female, Koelawi, February 2 and 23, 1917 ; two females, Rano Lindoe, 

 March 10 and 15, 1917 ; one male and one female, Gimpoe, August 12, 

 1917; two males, Pinedapa, January 22 and February 14, 1918. 



Two specimens in the above series (Nos. 250804 and 251842) taken 

 at Rano Lindoe, March 10, and Gimpoe, August 12, respectively, 

 have the lower mandible wax yellow and the tip of the upper 

 mandible horn color. A specimen taken at Koelawi, February 2, 

 has the lower mandible darkened along the tomium and the re- 

 mainder and extreme tip of the upper dusky horn color, while a 

 specimen taken at Rano Lindoe March 15 (No. 250805) has only the 

 tip of the lower and extreme tip of the upper mandible dusky horn 

 color. From the above it would appear that the wholly black bill 

 is only assumed by old birds. 



Of the two birds taken at Koelawi, the female is more rufescent 

 above, especially on the wing coverts, than any in the series, while 

 the male is much lighter below than any other specimen of the form 

 before me, approaching specimens of Pyrrhocentor c. celebensis but 

 still not quite so light below. 



Specimens taken at Laboea Sore, November 21, Koelawi, February 

 23, Rano Lindoe, March 15, and Pinedapa, January 22 and Feb- 

 ruary 14, are molting on the head, wings, and tail, but more especially 

 on the top of the head. The new feathers on the forehead are ivyxch. 

 darker than those they displace or after the molt is completed. One 

 sipecimen (No. 251845), Pinedapa, February 14, has the primaries 

 and tail very dark, the exposed part of the closed wings nearly the 

 color of the back, but this seems to be due to stain as the unexposed 

 part of the wings are of the usual color and there are signs of stain 

 at the base of the tail. 



When compared with specimens from the north end of the island 

 the above series averages more rufescent on the underparts and sides 

 of face; above there do not appear to be any striking constant 

 differences. 



127. RHAMPHOCOCCYX CALORHYNCHUS CALORHYNCHUS (Temminck). 



Six males and eight females from the following localities : Kwala 

 Besar, July 29, 1914; Paleleh River, August 8, 1914; Tandjong Pen- 

 joe, February 16-20, 1915; Likoepang, March 4, 1916; Toemaratas, 

 July 10, 1916. 



20183— 25— Proc.N.M.vol.64 24 



