



Immature Female. Upper parts olive-green ; wings and tail dark brown, the feathers edged with rufous- 

 shaded olive ; feathers in front of the eye, eyebrow, cheeks, and portion of the ear-coverts pale yellow ; 

 entire throat and under surface of the body olive-shaded yellow; upper mandible dark brown, lower 

 one light brown; gape orange; irides dark brown; legs greenish; nails brown; soles of the feet 

 ochre. Total length 4r4 inches, culmen 06, wing 23, tail 16, tarsus 06. 



IIab. Islands of Surigao and Sukuyok, and Placer in the north-east of Mindanao. 



The Grey-throated Sun-bird is closely allied to Anthreptes malaccensis, from which the adult 

 male may be at once distinguished by the ashy-grey colouring of the throat. In the type 

 specimen before me the metallic green and blue portions of the plumage are less glossed with 

 lilac than in A. malaccensis, and the sides of the head are more rufous ; but these characters 

 are possibly not constant. The yellow of the breast is of a decidedly more olive shade, causing 

 the pectoral tufts to contrast strongly ; and in this respect the species is very similar to 

 A. chlorigastra. 



A female from Surigao, collected in May, I have figured and described as an adult : its 

 plumage most nearly approaches to that of A. celebensis ; but the rufous edges to many of the 

 wing-feathers and to the tail-feathers are a well-marked character, which, however, may not 

 prove to be very constant. 



The specimen figured and described as the immature female was collected at Placer, a 

 village on the extreme north-east of Mindanao, in July 1877, and agrees with the young female 

 of A. celebensis already described, and only differs from that of A. malaccensis in the slightly 

 more olive shade on the breast. 



The three specimens above figured and described wei*e collected by Mr. A. Everett, from 

 whose notes I have taken the sexes and the colouring of the soft parts. They are now in the 

 Marquis of Tweeddale's cabinet. 



Previous to the publication of the first part of my present work, in July 1876, only one 

 species of this group of Anthreptes was recognized. We have now distinguished no less than 

 rive ; and many of the other groups of Sun-birds are in like manner rapidly increasing, especially 

 from the active researches which are now going on in the Philippine Islands, to which Dr. Steere's 

 recent acquisitions have given such a strong impulse. 



With regard to the habits of A. griseigularis we may safely presume that they closely 

 resemble those of A. malaccensis, and that the species is not uncommon in its native district, 

 which is, as far as we at present know, restricted to the islands of Surigao and Sukuyok and the 

 north-eastern portion of the large island of Mindanao. It may inhabit the entire island of 

 Mindanao; but we suspect that the ordinary form of Anthreptes on that island will prove to be 

 A. chlorigastra, which is known to inhabit Negros and the Sanghir Islands. 



