TABLE OF CONTENTS. 



Page. 



Family Colymbidse 1 



iEchmophorus occidentalis 1 



Western Grebe 1 



Habits J, 



Distribution 8 



Colymbus Holboelli 9 



Holboell's Grebe "_ 9 



Habits ^ 9 



Distribution ^ 18 



Colymbus auritus 20 



Horned Grebe 20 



Habits 20 



Distribution 25 



Colymbus nigricollis californlcus 27 



American Eared Grebe 27 



Habits ,; 27 



Distribution 34 



Colymbus domlnicus brachypterus 1 35 



Mexican Grebe 35 



Habits , 35 



Distribution 39 



Podilymbus Podiceps 39 



Pied-billed Grebe 39 



Habits 39 



Distribution 46 



Family Gaviidse 47 



Gavla Immer 47 



Loon 47 



Habits 47 



Distribution 59 



Gavla adamsi 60 



Yellow-billed Loon 60 



Habits 60 



Distribution . 64 



Gavla arctlca 65 



Black-throated Loon 65 



Habits 60 



Distribution 66 



Gavla paciflca 67 



Pacific Loon 67 



Habits 67 



Distribution Tl 



Gavla stellata 72 



Bed-throated Loon 72 



Habits 72 



Distribution 80 



XI 



