22 Trans. Acad. Sci. of St. Louis. 



October and November. Two males in Mr. Hurter's collection 

 were taken April 13 and November 27, 1877, near St. Louis. 



4. Colymbus nigricollis californicus (Heerm.). American 

 Eared Grebe. 

 Colymbus auritus, Podiceps auritus (in Nuttall and Audubon). Podiceps 



auritus californicus (in Coues' Key, 1872). Colymbus californicus (Grin- 



nell). California Grebe. Horned Grebe. 



Geog. Dist. — Western North America from the Mississippi to 

 the Pacific and from Central America to Great Slave Lake. 

 Breeds in colonies in suitable localities throughout its range, but 

 has suffered greatly from persecution by plume hunters. 



In Missouri formerly a common transient visitant from April 

 9 to May 3, and from September 22 to November 2, but much 

 scarcer now; more common west than east. 



*6. Podilymbus podiceps (Linn.). Pied-billed Grebe. 



Colymbus podiceps. Podiceps carolinensis. Carolina Grebe. Thick-billed 

 Grebe. Hell-diver. Dabchick. Dipper. Water-witch. 



Geog. Dist. — North and South America except extreme 

 northern and southern parts. Breeds throughout its range. 

 Winters in southern states and southward. 



In Missouri by far the commonest of the family. May be 

 found in its migrations in spring and fall on all waters, on rapidly 

 flowing rivers, and even on small ponds. The first arrive in 

 southeast Missouri early in March, at St. Louis the last of March, 

 and in northern Missouri early in April. The bulk is present in 

 April, but migration lasts till early in May. Fall migration takes 

 place from the middle of September until the end of November, 

 chiefly in October. Formerly a common breeder in all reedy 

 lakes throughout the state, but with drainage and persecution 

 it is becoming rarer every year. 



Suborder Cepplii. Loons and Auks. 



Family Gaviidab. Loons. 



7. Gaviaimber (Gunn.). Loon. 



Urinator immer. Colymbus torquatus. Colymbus glacialis. Great Northern 

 Diver. Walloon. 



Geog. Dist. — Northern part of northern hemisphere. Breeds 

 from northern United States northward to Greenland and Alaska 



