MU.SCAUIVOKES. 45 



A-bu-un, Cagayancillo. 



Cagaj'an'billo * {McGregor) ; Cagayan Sulu {Guillemard) ; Sibutu (Everett); 

 Sulu {Guillemard) . Mantanani Islands, Lawas River, northwest Borneo. 



"Adult male. — Head and under parts gra3asli vinous, changing into 

 pure gray on lower hind neck and upper mantle; frontal edge, a ring 

 of feathers round eyes, and chin whitish ; back, rump, and wings grayish 

 green (in some specimens witli a slight brown tinge), with a metallic 

 luster in some lights; longer upper tail-coverts and tail above metallic 

 l)ottle-green ; primaries mealy green, especially on outer webs; under 

 surface of wings and tail gray; under tail-coverts gray with a reddish 

 tinge. 'Iris crimson ; bill light lead-gray ; feet dull crimson/ {Everett.) 

 Length, about 400; wing, 240; tail, 173; bill, 20; tarsus, 28. 



"Female. — Similar to the male." (Salvadori.) 



This species was very abundant on Cagayancillo where it fed entirely 

 on young leaves of trees. 



36. MU§CADIVORES LANGHORNEI (Mearns). 



LANGHORNES IMPERIAL PIGEON. 



Muscadirora Uinyhornci ^1i:akn.s. Proc. Biol. Soc. Wash. (1905), 18, 84; 

 McGregor and Worcester, Hand-List (1906), 11. 



East Bolod { M earns) ; West Bolod {M earns). 



"This large fruit pigeon is closely related to Muscadirora picheringl 

 (Cassin) from Mangsee Island north of Borneo, on the west side of tbe 

 Sulu Sea, of which the type (Xo. 15732) is in United States National 

 ^luseum. Tlic size is practically the same; but the colors differ as 

 lollows: General coloration paler; the vinous-gray of the head and under 

 ])arts is darker, tlie gray of lower liind neck extends farther down on the 

 mantle, tbe white around the base of the bill and surrounding the eye 

 is more extensive, the Ijack and rump are paler and less brownish gray, 

 tbe wings are paler, grayer and less greenish, and the under tail-coverts 

 loss reddish. Iris i)urplish red; region of the nostrils dark plumbeous; 

 bill light pluml)eous; naked eyelid deep vinaceous; bare space around 

 eye plumbeous; feet vinaceous, flesh-color on under side of toes; claws 

 ]>lumbeous. Three adult males: Length, 456, 45G, 4G0; alar expanse, 

 770, 7(3(>, 770; wing, 242, 242, 243; tail, 180, 180, 178; culmen, 19, 21, 

 10; tarsus, 30, 31, 32; middle toe with claw, 48, 49, 45." (Mearns.) 



Genus PTILOCOLPA Bonaparte, 1854. 



Sexes unlike in plumage: bill and gape rather small compared with 

 Miisradirores; nostril opening elongate: first primary atteniuited and 

 scooped on inner web; second ])rimary sligiitly sco()])(m1 ; [nuev i)riinaries 

 obliquely cut at tip: tbe outline siiuioiis ami outer web fxtfiiding beyond 

 sliaft and inner web; tarsus partly leathered. 



*■ Birds from soiiu' of tlicsc Idealities m-.iv he .1/. liuifihornei. 



