INSESSORES. 211 



back and wing-coverts yellowish olive; wings dark slate- 

 colour, margined with grey ; tail entirely grey ; under tail- 

 coverts white, or very slightly washed with yellow ; irides 

 reddish brown ; bill black ; feet dark brown. 



Total length 7 inches ; bill f ; wing 4 ; tail 3f ; tarsi 1 . 



Sp. 115. PACHYCEPHALA MELANURA, Gould. 



Black-tailed Thickhead. 

 Pachycephala melanura, Gould in Proc. of Zool. Soc, part x, p. 134. 



Pachycephala melanura, Gould, Birds of Australia, fol., vol. ii. 

 pi. m. 



The Pachi/cephala melanura is a native of the northern 

 coasts of Australia, where it was procured by B. Bynoe, Esq., 

 during the surveying voyage of H.M.S. the Beagle. It may 

 be readily distinguished from the P. (/utturalis and F.^laucura 

 by the jet-black colouring of the tail (which organ is also 

 shorter and more square than that of any other species), by 

 its much longer bill, and by the colouring of the back of the 

 neck and the under surface being richer than that of either 

 of those above named. I have not yet seen a female of this 

 fine species. Whenever this sex is collected, it will be found 

 to bear a very general resemblance to the females of F. gut- 

 furalis and P. glaucura. 



Head, crescent commencing behind the eye and crossing 

 the chest, and the tail black ; throat pure white ; collar 

 round the back and sides of the neck, and all the under 

 surface, very rich gamboge yellow ; upper surface rich yellowish 

 olive; wings black, the coverts margined with yellowish 

 olive ; the primaries narrowly, and the secondaries broadly 

 margined with yellowish grey ; bill and feet black ; irides 

 brown. 



Total length 6 inches ; bill | ; wing 3^ ; tail 2^ ; tarsi |. 



