36 A MANUAL OF THE BIBDS OF AUSTRALIA. 



Genus /ESTRELATA. 



SSS^rS^^ 



cellaria hasitata Kuhl. 



There is a series of these Pterodromoid Petrels which do not show any very 

 appreciable difference in structure, but which have probably followed a differer 

 route of development. We are keeping the present name m view in order t 



lnVe S ^^r^inTbiSs with short stout black bills, long wings, long tail 



^ The* bilfl^pamtively short and stout, only about three-fourths the length 

 of the tarsus. The details are typically Pterodromme. 



The wing is long with the first primary longest. The tail is long and wedge 

 shaped nearly half the length of the wing, but less than three times the 1 

 the tarsus. The legs are stout, not so much lateral compression, and cover 

 usual, with reticulate scaling ; the hind-toe exists only a* a projecting point and the 

 long toes are fully webbed. 



Coloration mainly white, wings and back dark coloured. 



27. JEstrelata lessonii. WHITE-HEADED PETREL. 



[Procellaria lessonii Garnot, Ann. Sci. Nat., Paris, Vol. VII., p. 54, 1826: Falkland Islands 



Seas. Extra-limital.] 



Gould, Vol. VII., P l. 49 (pt. xxxv.), Dec. 1st, 1848. Mathews, Vol. II., pt. 2, pi. 85, J 



Pwettaria leucocephala Forster, Descr. Anim., ed. Licht., p. 206, (pref. Jan. 1st) 1844 : 



No? o?Kuht Beitr. Vergl. Anat., p. 142. 1820, nor Griffith ' 1829 i." 

 Procellaria vaffabunda Mathews, Birds Austr., Vol. II., pt. 2, p. 155, July 3 1st. 1 

 SolanderMS.) : Bass Straits, Australia. 



Not of Gray, Genera Birds, Vol. Ill, p. 648 ,1844, as 9***** 54 April 7tb 

 ^strelata Ussonii australis Mathews, Austral Av. Rec., Vol. III., pt. 3, p. 54, Apri. 

 1916 : Sydney, New South Wales. 

 DISTRIBUTION. Southern Australian Seas. 



Adult male. General colour above pale grey, including the hind-neck, sides of 

 neck, back, scapulars, and tail, darker on the wings and long scapulars ; les* 

 median wing-coverts blackish like those round the margin of the wmg- and prima 

 coverts ; primary -quills blackish, paler on the inner webs ; secondaries slate-grey, 

 white at the base ; feathers of the back and short scapulars grey with paler gre; 

 margins ; upper tail-coverts paler grey than the back, margined with white ; midd 

 tail-feathers grey, the outer ones white-mottled or dusted with grey ; feathers round 

 the eye blackish ; fore-head, lores, and chin white, mottled with grey ; throat an 

 remainder of under-surface white ; axillaries ash-grey, white at base and fnri 

 with white at the tips ; under wing-coverts pale brown with whiti 

 bill black, iris black; tarsi and base of feet fleshy -white toes ^. n ou f ^ R P^ on 

 of webs black. Total length 413 mm. ; culmen 36, wing 314, tail 30, tarsi 

 Adult female. Similar to the adult male ; wing 308. 

 Immature. Similar . 

 Nestling . Undescribed . 



N^ A large chamber at the end of a burrow. 

 EQQ Clutch, one ; pure white ; axis 72 mm., diameter 51. 

 Distribution and forms. Round the Sub-antarctic Circle. Two forms have been 

 suggested: A. I lessonii (Garnot), from the Falkland Islands seas ; A. I. austr 



