Raptorial Birds of the Malay Archipelago. 9 



7. AcciPiTER MUELLERi, Wall., P. Z. S. 1865, p. 475 ; Ery- 

 throspiza griseogularis (pt.), Kaup, P. Z. S. 1867, p. 175 ; Nisiis 

 cruentus, Schleg., Valk. Nederl. Ind, pi. xiv. & xvi. 



Bill black, bluish at base; cere and feet bright yellow. 



Hab. Gilolo [Wall). 



Dr. Kaup considers this bird to be an old specimen of A. 

 griseogularis, which has lost the nape-band. I must therefore 

 point out their differences. A. muelleri is of a uniform and very 

 dark slate-colour above, which the other never is ; beneath it is 

 as dark as A. iogaster, although banded like A. griseogularis, but 

 more distinctly. The bands of the tail are wider apart, the 

 four next the end occupying a space of .2'5 inches, whereas in 

 A. griseogularis they occupy scarcely 3 inches. On the throat 

 there is a faint stripe of rufous, the feathers being white at the 

 base, and banded with slate-colour and rufous at the ends ; but 

 perhaps the most important character is that the primaries are 

 of a different form, being very slightly emai'ginate on the inner 

 web. It appears to me to be much more nearly allied to A. 

 iogaster than to A. griseogularis, and to be, in fact, the represen- 

 tative of that species in Gilolo. 



8. AcciPiTER GRISEOGULARIS (G. R. Gray, P. Z. S. 1860, 

 p. 343) ; Nisus cruentus, Schleg., Mus. P.-B. Astures, p. 41, 

 Valkv. Nederl. Ind. pi. xiv.-xvi. 



Hab. Batchian, Gilolo, Ternate, Morty Is. {Wall.). 



Bill black, lead-colour at base ; cere yellowish ; feet olive or 

 ochre-yellow. 



I possess eight specimens, of both sexes, and in various stages 

 of plumage. In all these the tail only varies in length from 

 8*25 to 8*75 inches, the wing from 95 to lO'S in. ; the tarsus 

 is in all about 2" 7 inches, the bill from the cere to the point 

 •85 in., and "5 to -oS high at the cere. These characters appear to 

 me sufficient to distinguish it from the next species. Dr. Kaup 

 agrees with me that these birds are quite distinct from A. 

 cruentus, Gould (P. Z. S. 1842, p. 113), with wliicli Prof. 

 Schlegel places them. Ail of this form have the 4th and 5th 

 primaries equal and longest, whereas in A. a'uenius the 5th is 

 decidedly shorter than the 4th, and barely equal to the 3rd. 



