AVES PUFFINID/E. 



155 



FIG. 95. 



FIG. 96. 



Halobana ccerulea. Profile of head. From 

 material in the British Museum. Natural size. 



Halobcena carulea. Head from above. 

 From material in the British Museum. 

 Natural size. 



GENERAL DESCRIPTION. 



Size. Adult. Total length, about 11 inches. 



Wing, 8.5 inches: 



Tail, 3.6 inches. 



Bill, 1.4 inches. 



Tarsus, 1.3 inches. 



Color. Adult. General color above, clear greyish blue, darkest on 

 the crown, the nape, scapulars and lesser wing coverts; below white, 

 except the sides of the breast which are ashy blue. 



Head : Rather dark greyish blue. The middle .feathers of the forehead 

 are ashy blue broadly tipped with white, and the rest of the forehead 

 white. There is a suggestion of a white superciliary streak not extending 

 behind the eyes however. The cheeks and auriculars white. 



Neck : Ashy blue above and pure white below. 



Back : Clear pale ashy blue. 



Wings : Darker ashy blue, the scapulars tipped with white ; primaries, 

 outer webs ashy blue, inner webs whitish. 



Tail : Outer rectrix white, the two next ashy blue, with white bases to 

 the inner webs, the three next ashy blue with white tips. This is widest 



