58 STUART-SUTHERJ.AXU, Rouud the Lamp, r.'j^ /^Ty" 



6. Puffinus griseus. Mutton Bird. Sooty or Sombre Shearwater. 

 Titi. Oi. — Plentiful, but somewhat erratic in their appearances during 

 the months of December, January, February, and March. A curious 

 fact in connection with the Mutton-Birds isthat on one night all the 

 specimens killed against the lantern will be males, whilst on another 

 night all will be females. These birds breed in the near vicinity, on 

 Crayfish (Steep-to) Island, and it is possible that the sexes take turn 

 about to secure food. P^emales containing partly developed eggs have 

 been killed in early December. Young birds of the year can be dis- 

 tinguished from old ones by the colour of the legs and feet. Old 

 birds have these parts bluish, whilst young ones have them brownish 

 olive. The measurements of a typical pair are as follows: — 



Taisus. 



7. Pterodroma (^Estrelata) cooki. White-winged (Cook) Petrel. — 

 Only two specimens. One (female) in May, 1919, and one (male) in 

 October, 1920. Measurements — 



8. Pterodroma inexpectata (^Estrelata gularis). Mottled or Scaled 

 Petrel. — So named, I take it, on account of the scale-like marking on 

 the forehead'. On December 27th, 1920, one stinack the panes and 

 broke its wing. It proved to be a female, and contained an cgfc just 

 ready to be laid. The egg is dead white in colour, and measures 54 x 

 38 mm. Since that date upwai'ds of a dozen have been accidentally 

 killed. Three in March, 1921; five in August, 1921; two in Septem- 

 ber, and two in December. These birds breed in the district, and, 

 like the Mutton-Birds, all the examples killed on one night are of 

 the one sex. The measurements are as follows: — 



Length. Wing. 

 ^strelata gularis .7 34G. 257. 



J 344. 256. 



The correct name of this species apparently should be Pterodroma 

 inexpectata (Forster). The common name generally in use in New 

 Zealand is Rain-Bird. 



9. Garrodia nereis. Grey-backed Storm- Petrel. Reoreo. — The most 

 seen on any one night was nine. Very few of these birds are killed 

 outright, mainly, I suppose, l)y reason of their very light weight. 

 Mostly a wing or a leg is broken. Storm-Petrels are purely nocturnal. 

 Uninjured birds kept during the day very rarely attempt to fly away. 

 Examples injured in October, November and December have the 

 generative organs much enlarged. The following are the measure- 

 ments of a pair injured at almost the .same moment (1.30 a.m., Decem- 

 ber 7th, 1921):— 



