526 Nichols and Murphy, Genus Phcebetria. [^^^ 



MEASUREMENTS IN MILLIMETERS (AVERAGE, MINIMUM 

 AND MAXIMUM) OF SERIES OF PSALTRIPARUS 



Psattriparus minimus minimus 



10 males from Los Angeles Co., California 

 PsaUriparus minimus californicus 



10 males from the Sacramento Valley, California 

 PsaUriparus minimus californicus 



9 adults from the Warner Mts., California 

 PsaUriparus minimus californicus 



5 adults from the Sierra Nevada, California 

 PsaUriparus plumbeus 



8 adults from Inyo County, California 

 PsaUriparus plumbeus 



10 males from the Huachuca Mts., Arizona 

 PsaUriparus plumbeus 



5 adults from Humboldt County, Nevada 



Wing 



46.8 



(46-48) 



47.2 



(46.5-49) 



49 5 

 (48-50.5) 



47.8 



(47-48.2) 



51 



(50-52) 



50.4 



(49-51) 



51.3 



(50.5-52.5) 



Tail 



Culmen 



Tarsus 



15.8 

 (15-16) 



15.8 

 (15-16.5) 



15.8 

 (15-16.5) 



16.3 

 (16-16.5) 



16.3 

 (16-16.5) 



15.6 



(15-16) 



16 1 



(16-16.5) 



A REVIEW OF THE GENUS PHCEBETRIA. 



BY JOHN TREADWELL NICHOLS AND ROBERT CUSHMAN MURPHY. 



Plate XLI. 



The possession by the American Museum of Natural History 

 and the Brooklyn Museum of a series of skins of Phoehetria palpe- 

 brata antardica from South Georgia Island in the Subantarctic 

 Atlantic, and of two specimens of Phoebctria fusca from the temper- 

 ate South Atlantic, has led us to assemble additional material for 

 purposes of comparison. Our study brings us to the conclusion 

 that the east Pacific, or American west coast, Sooty Albatross, w^hich 

 is the Biomedea fusca of Audubon and the P. palpebrata of the latest 

 A. O. U. Check-List, (1910), belongs to an undescribed race of 

 palpebrata. A review of the genus in the light of the material 

 examined may aid future workers. 



The characteristics which differentiate the two well-marked 

 species palpebrata and fusca can be comprehensively stated in the 

 form of a kev : — 



