CACATUID.E. 101 



Family IV. CACATUIDiE. 



Sternum complete ; orbital ring completely ossified, with a process 

 bridging the temporal fossa (Garrod, P. Z. S. 187-1, p. 591) ; nostrils 

 open in a cere not much swollen, generally naked, but sometimes 

 feathered ; bill very deep, deeper than long, with the upper mandible 

 generally much compressed ; hook of the upper mandible nearly 

 perpendicular, except in Licmetis, and with a file-like surface under- 

 neath ; tarsus short ; head always crested : as a rule, only the left 

 carotid present. 



Ranging over the Australian Region, and also in the Philippines. 



Key to the Subfamilies. 



a. Tail-feathers broad, not pointed .. CACATUlNJE,y.\Q\. 



b. Tail-feathers narrow, and pointed . . C ALOV SIT T ACINAR, p. 135 



Subfamily I. CACATUIN.E. 



Key to ilie Genera, 



I. Cheeks entirely naked ; upper mandible 



much compressed and much narrower 

 than the under inaudible ; feathers of 

 the crest very long and narrow 1. Microglossus, p. 102. 



II. Cheeks feathered. 



a. Tail rather long, the outer tail- 



feathers shorter than the others ; 

 feathers of the crest broad ; bill 

 short, much curved and very high ; 

 general colour brown or black 2. Calyptorhyxchus,p. 100. 



b. Tail moderate, nearly even. 



a'. General colour above and below 



grey ; head and crest red in the 



male ; cere feathered 8. Callocephalox, p. 113. 



b' '. General colour white or rosy 



white, except ill Cticahia rOSei- 



cn/>il/(i. which is grey above, rose- 

 colour on the head and below. 

 (/". Bill with the hook of the upper 

 mandible of the ordinary size 

 and nearly perpendicular' .... 4. Cacatda, p. 115. 

 b". Bill with the hook of the upper 

 mandible very long, slender, 

 and projecting forward 5. Licmetis, p. L33. 



