146 Mr. W. R. Ogilvie-Grant on a 



bird procured at Lamag, Sandakan, in the month of May, by- 

 Mr. Gray don. This example is undoubtedly an adult male 

 in full breeding-plumage, and its dimensions, especially 

 the measurements of the bill and legs, exceed those of the 

 specimens previously mentioned. 



The following is a description of the species, -which has 

 been named in honour of Mr. William Morton : — 



DlSSURA MORTONI. 



Melanopelargus episcopus Everett (nee Bodd.), Journ. 

 Straits Branch As. Soc. 1889, p. 191. 



Dissura episcopus Sliarpe, Cat. B. Brit. Mus. xxvi. p. 294 

 (1898) [part.; specimen n', ex LabuanJ. 



Dissura mortoni Grant, Bull. B. O. C. xiii. p. 26 (1902). 



Adult male. Resembles D. episcopus in general appearance, 

 but differs in the following important points : — It is consi- 

 derably smaller, the outline of the cnlmen is slightly concave, 

 and ends in a protuberance in front of the forehead ; the 

 bill is vermilion, the bare skin round the eyes and on the 

 throat and neck is orange or orange-yellow ; the legs and feet 

 are dull vermilion ; the basal half of the neck is clad in black 

 feathers, which extend up the downy white sides of the upper 

 neck in two wedge-shaped patches ; both the wing and tarsus 

 are shorter, the latter being more slender. Iris yellow. Total 

 length 310 inches, culmen 6*5, wing 16'2, tail 6*2, under 

 tail-coverts 7'0, tarsus 65, middle toe without claw 30. 



The male (type) which is apparently in full breeding- 

 plumage, further differs from all the specimens of 

 D. episcopus with which I have compared it in having the 

 interscapular region clad in long, loose, purple-tipped 

 feathers like those of the chest, but it must be added that 

 the British Museum does not possess specimens of the latter 

 species killed during the breeding-season. 



Adult female. Like the male, but with a somewhat smaller 

 and shorter bill. Iris red ; naked skin round eye orange- 

 yellow ; bill vermilion, the under part mixed with red 

 and yellow; legs dull vermilion {W. Morton). Total length 

 about 30 - inches, culmen 5 - 7, wing 150, tail 5*3, under 

 tail-coverts 6*4, tarsus 55, middle toe without claw 27. 



