1906. 



NATURAL SCIENCES OF PHILADELPHIA. 



191 



CoUocalia origenis sp. nov. 



Chars, sp. — Resembling CoUocalia ivhiteheadi, but upper parts much 

 darker, more blackish, and more uniform, the rump not appreciably 

 lighter than the back; under surface darker, and throat not decidedly 

 paler than abdomen. 



Geographical distribution. — Mindanao, Philippine Islands. 



Description.— Type, adult male. No. 192,162 U. S. N. M. ; Mount Apo, 

 4,000 feet, Mindanao, Philippine Islands, July 4, 1904; Dr. E. A. 

 Mearns. Upper siu-face uniform brownish black, the rump not lighter, 

 but wings and the distinctly forked tail more brownish, their feathers 

 paler along the inner margins; entire ventral sm'face uniform smoky 

 hair brown, the throat not paler; sides of head and neck darker brown 

 than the under parts; a blackish spot in front of the eye; lining of wing 

 blackish brown. 



This new species was discovered by Dr. Mearns during his recent 

 trip to the island of Mindanao, the four adults obtained having been 

 brought by natives who had found them in a cave on Mount Apo ; and 

 we are indebted to him for the privilege of describing them. 



In its large size, deeply emarginate tail, and lack of tarsal feathering 

 CoUocalia origenis agrees with CoUocalia whiteheadi, but is readily dis- 

 tinguishable by the dark colors, particularly on the upper parts which 

 are even more blackish than in CoUocalia fiiciphaga fuciphaga from the 

 Philippines. There is a slight sexual difference in this species, appa- 

 rent in our series of two adult males and two adult females, but it is 

 possibly not constantly distinctive: the females are somewhat more 

 brownish above, and slightly paler below. A very young bird, with 

 wings and tail but little grown, taken by Dr. Mearns, July 11, 1904, 

 at Todaya, altitude 4,000 feet, on ]\Iount Apo, is fully as l^lackish on 

 the upper parts as the adults, and somewhat darker, decidedly more 

 grayish on the ventral surface. 



Measurements of the adults are as follows!: 



Average. 



132.8 54.5 5. 



13.4 



Type. 



