ILLUSTRATIONS OF ORNITHOLOGY. 
Jardine Hall Specimen. — Entire length, 5.9; bill to fore- 
head, i ; wing to longest quill, 3. 
M. Bourcier’s Specimen. — Entire length, 5. 2 ; bill to fore- 
head, 9 ; wing to longest quill, 2. 7. 
Zanzibar Specimen. — Entire length, 4. 5; bill to forehead, 9; 
wing to longest quill, 2 . 7. 
There is a considerable difference in the size of the three speci- 
mens ; but the length of the wing, which is most to be depended 
upon, is the same in two of them, and not very different in the 
large one ; upon the whole, we incline to consider the Zanzibar 
species as only a local variety. 
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