694 MANUAL OF PHILIPPINE BIRDS. 



third and equal to sixth; the fourth longest; rectrices well developed, 

 tail slightly rounded. 



Genus ORIOLUS Limifeus. 1766. 



Characters the same as those given for the family. In the Philippine 

 species the ^srevailing colors are yellow, l)lack, and gray ; the rectrices 

 are black, tipped with j^ellow in all the species. 



Species. 



a\ Under parts entirclj- yellow, or yellow streaked with black or olive; throat 

 and chest never black nor gray. 

 5'. Much larger; wing more than 140 mm.; tail, about 110; under parts uniform 

 yellow (adult), or with black shaft-lines on the breast (young). 



acrorhynchus ( p. 695 ) 

 b". Much smaller; wing less than 130 mm.; tail, 90 or less. 



cS Lores and chin yellow; bill leaden blue; bill from nostril, about 18 mm. 



isabellae (p. 697 > 

 c". Lores and chin wliite; bill dull red; bill from nostril, about 15 mm. 



albiloris (p. 697) 

 tt^. Under parts yellow on crissum only; throat and chest gray, Ijlack, or streaked; 

 abdomen white heavily streaked with black. 

 &\ Crown and hind neck bright yellow, or greenish yellow, uniform with mantle 

 and back ( sexes alike ) . 

 c'. Crissum bright yellow; shafts of rectrices light yellow below, inner webs 

 broadly tipped with yellow, the spots 8' mm. or more in length. 

 (P. Inner webs of wing-quills edged with bright yellow; under wing-coverts 



bright yellow samarensis (p. 698) 



d^. Inner webs of wing-quills edged with white, pale gray, or pale yellow, 

 never with bright yellow. 

 e^. Inner webs of quills edged with white or pale gray; yellow spots at 



tips of rectrices larger steeri (p. 698) 



e^. Inner webs of quills edged with pale yellow; spots at tips of rectrices 

 smaller. 

 f. Ear-coverts dull olive-yellow; smaller; wing, about 110 mm.; tail, 



70 basilanicus ( p. 699 > 



/-. Ear-coverts pure gray; larger; wing, about 115 nun.; tail, 80. 



cinereogenys (p. 700) 

 c^ Crissum dark greenish yellow; rectrices nearly unifojin black, very nar- 

 rowly tipped with yellow, the spots about 2 mm. in length; the shafts 



white or gray assimilis (p. 700) 



b-. Crown and hind neck black (male), or black streaked with olive-green 

 (female), in contrast with the yellow mantle and back. 



xanthonotus (p. 701) 



