55 



720. HALOCYPTENA MICROSOMA COUES. 



Least Petrel. 



721. PROCELL ARIA PEL AGICA Linn. 



Stormy Petrel ; Mother Carey's Chicken. [645.] 



722. OCEANITES OCEANICA (Kuhl) Coues. 



"Wilson's Petrel. [644.] 



723. CYMOCHOREA LEUCORRHOA (Vieill.) Coues. 



Leach's Petrel. [642.] 



724. CYMOCHOREA MEL^NA (Bp.) Coues. 



Black Petrel. [643.] 



725. CYMOCHOREA HOMOCHROA Coues. 



Ashy Petrel. 



726. OCEANODROMA FURCATA (Gmel.) Bp. 



Fork-tailed Petrel. [640.] 



727. OCEANODROMA HORNBYI (Geay) Bp. 



Hornby's Petrel. [641.] 



728. FREGETTA GR ALL ARIA (Vieill.) Bp. 



"White-beUied Petrel. [646.] 



729. iECHMOPHORUS OCCIDENTALIS (Lawe.) CoueS. 



Western Grebe. [704.] 



730. ^CHMOPHORUS CLARKI (Lawr.) Coijes. 



Clark's Grebe. [705.] 



731. PODICEPS HOLBOLLI Eeinh. 



American Red-necked Grebe. £702, 703a. 1 



732. BYTES AURITUS (Linn.) Ridgw. 



Horned Grebe. [706.] 



£733.] BYTES NIGRICOLLIS (Sund.) Ridgw. 

 Eared Grebe. [708.] 



733a. BYTES NIGRICOLLIS CALIFORNICT7S (Heeem.) ElDGW. 

 American Eared Grebe. [707.] 



734. TACHYBAPTES BOMINICUS (Linn.) Coues. 

 St. Bomingo Grebe. [708 a.] 



POBILYMBUS POBICEPS (Linn.) LAWft. 

 Thick-billed Grebe. [709.] 



736. COLYMBUS TORQUATUS Beunn. 



Loon. [698.] 



737. COLYMBUS ABAMSI Gray. 



Great White-billed Loon. 



738. COLYMBUS ARCTICUS Linn. 



Black-throated Biver. [699.] 



