Sovie Birds of Molokai. 53 



auxiliaries forming a patch on the side of the body under the 

 wings in Galapagos specimens are entirely wanting in all Hawaiian 

 specimens in the Museum ; even the immature bird from Hilo 

 beach. In sandwichensis the white frontal band is wider and the 

 black bases to the white feathers composing it do not reach to the 

 base of the beak, as in phceopygia. The whole back and wings are 

 blackish slate, with the feathers of the mantle inconspicuously, if 

 at all, marked, with paler tips (not slate black with conspicuous 

 whitish terminals as in pliceopygia) . The outer pair of tail feathers, 

 viewed from above, vary somewhat, but they are always in both 

 adult and immature birds, strongly mottled with white on their 

 inner, and to some extent, on their outer webs. 



I regard phceopygia and sandwichensis as distinct, though 

 closely allied species with the latter possessing characters of color, 

 measurement and habitat sufficiently marked to distinguish it 

 from the former in all ages and both sexes. I, therefore, adopt 

 Ridgway's name as published in the text of the Water Birds of 

 North America (vol. ii, p. 395, 18S4) as the proper designation for 

 the Uau (not Uuau as sometimes erroneously given), or Hawaiian 

 Dark-rumped Petrel. 



Puffinus newelli Henshaw. 



Unfortunately, I did not secure a specimen of this rare bird, 

 though I had the pleasure of examining one that had been pre- 

 served by Mrs. Wilson. It had been collected some years before, 

 from one of the steep cliffs toward the summit of the mountain 

 between Pelekunu and Waikolu valleys. The description taken 

 from it accords exactly with a specimen in the Museum collection 

 from Kauai. The bird is known on Molokai as Ao — the name 

 being an imitation of its nocturnal cry. Pelekunu natives in- 

 formed me that during the "bird season", early in October, the 

 adults and young can be collected in considerable numbers from 

 the cliffs. They were quite clear as to the distinguishing char- 

 acters between the Uau and the Ao ; giving differences which an 

 unobservant person would have passed over. Therefore, I have 

 every reason to have confidence in what they told me concerning 

 their habits. The>- assured me that some birds were seen, or 

 rather heard, throughout the vear (?), but that thev became plenti- 



Ci43j 



