THICKHEADS 



353 



Key to the Species. 



I. Jet black pectoral collar. Above olive yellow or olive 



green. Yellow in the plumage. Under surfaces 

 yellow. Throat white. 

 Head black. Under surfaces bright yellow. 



Tail all deep black. Length 6.23 inches, wing 



3.55, tail 2.7. 

 Tail basal part olive grey, tip black. Length 6.95 



inches, wing 3.74, tail 3.28. 



Tail basal part simply grey, tip black. Length 6.73 



inches, wing 3.76, tail 3.15. 

 Tail all grey. Length 6.95 inches, wing 3.93, 



tail 3.32. 



II. Black pectoral collar. Above ashy grey. No yellow in 



plumage. Head ashy grey or brown. 

 Throat white. 



Under surfaces ci'eamy pale brownish. CoHar 

 broad. Length 5.76 inches, wing 3.42, tail 2.56. 



Under surfaces creamy white. Collar narrow. 



Under surfaces orange brown. Collar broad. 

 Throat rusty red. 



Lores black, cheeks rusty red. 



III. No black pectoral collar. Mostly plain colours. 

 Throat whitish, freckled with brown. 



Total length 7.5 inches. Under siirface dull fawn. 

 Throat white. Under surface white. 



IV. Head and breast black, hind nec-k with chestnut band, 



rest of upper parts ashy. Throat, abdomen and 



flanks white. 



A black pectoral collar in front of the chestnut band 



on the neck. 



The chestnut band covers the whole of the neck. 



Black and chestnut bands across the chest. 



P. melanura. 



P. pectoralis 



(gutturalis). 



P. occidentalis. 



P. glaucura. 



P. falcata. 

 P. pallida. 

 P. rufiventris 



P. gilberti. 



P. olivacea. 

 P. simplex. 



P. lanioides. 

 P. fretorum. 



The distribution is as follows : — 



The Black-tailed Thickhead, P. melanura. North-west Australia, Northern 

 Territorj'-, North Queensland, to South New Guinea. 



White-throated Thickhead, P. pectoralis. — Eastern Australia. 



Western Thickhead, P. occidentalis. — Western Australia. 



Grey-tailed Thickhead, P. glaucura. — Tasmania, Islands of Bass Strait. 



Northern Thickhead, P. falcata. — All northern coasts. 



Pale-breasted Thickhead, P. pallida. — Gulf of Carpentaria. 



Rufous-breasted Thickhead, P. rufiventris. — Generally distributed. 



Red-throated Thickhead, P. gilberti. — Except in North-west, Centre, and 

 Queensland. 



Olive Thickhead, P. olivacea. — New South Wales, Victoria to Tasmania. 



Brown Thickhead, P. simplea:. — Port Essington. 



White-bellied Thickhead, P. lanioides. — North-west coast. 



Torres Strait Thickhead, P. fretorum. — North and North-west Australia. 



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