66 jNIr. R. B. Sliavpe on the 



seems to prove conclusively that the sexes are similar when 

 they are fully adult. The description of the adult female 

 therefore, as given by me in the ' Catalogue of Birds/ is 

 erroneous, and refers only to the young bird. 



The following are the dimensions of Mr. Whitehead's 



series : — 



Total 



length. Wing. Tail. Tarsus, 

 in. in. in. in. 



n. S ad. Abai, N.W. Borneo 18-6 lo-SS 9-1 3'3 



A. [ 5 ] ad. Labnan 20-5 15-8 0-8 3-4 



c. 2 ad. Abai 18-0 14-o 87 3-1 



d. S ad. Abai 16-5 13-9 80 3-05 



e. 2 imm. Abai 17-5 13-7 8-2 2-95 



/. $juv. LawasEiver 17-3 13-9 8-2 3-1 



fl. Juv. Labium 20-5 15-4 9-2 3-45 



)i. Juv. Labuan 20-0 irr3 8-6 3-5 



/.Juv. Paulou Sebang, Malacca ... . 21-5 15-9 8-7 3-3 



Young. More or less rufous, especially below; mantle 

 more or less streaked ; well-marked shoulder-patch ; head 

 varying from fawn-buff to white ; centre tail-feathers uniform 

 at first, outer ones brown, more or less mottled with rufous, 

 but not barred. So from early in February. Signs of 

 moult slight. 



The fawn-coloured head and light parts often bleach to 

 white, including shoulder-patch and throat, and often have 

 a patch on the breast ; the rufous mottling on the tail 

 takes more the form of bars, and the centre feathers are dark 

 brown, tolerably distinctly barred with lighter brown. 



In April a female bird shot in full moult from brown plumage 

 is very uniform in character and has a dark head. It has 

 a pure white feather coming on the side of the neck ; upper 

 tail-coverts white, with rufous spots. The old tail-feathers 

 are brown, with broad darker brown bars and a great deal 

 of rufous mottling towards the base. The newly moulted 

 feathers are dark ashy grey, with whitish tips, and crossed 

 by five broad blackish bars. No shoulder-mark. 



Another female, shot at Abai on the 19th of February, is 

 also in full moult, and seems to illustrate the intermediate 

 stage towards the full plumage. The centre tail-feathers are 



