BIRDS—COLYMBIDAE-—PODICEPS CORNUTUS. 
895 
PODICEPS CLARKII, Lawrence. 
Clark’s Grebe. 
Sr. Ch. — Winter. Upper part of the head and hind neck plumbeous black; back and wing coverts blackish grey, with a 
plumbeous hue ; feathers with lighter margins ; primaries ash at the end for one-third their length, basal two-thirds white ; 
secondaries white, with the outer edges of the outer webs ash ; a line of white extends from the base of the upper mandible to 
the eye ; fore part and sides of the neck, with the w T hole under surface, pure silky white ; the bill is yellow, except the ridge of 
the upper mandible, including and on a line with the nostrils, where it is black ; iris red ; tarsi and feet greyish black externally, 
and flesh colored internally in the dried specimens. 
Length, 22 inches; wing, 7| ; bill, 2j ; tarsus, 2|. 
Hab. —California and New Mexico. 
Three specimens are in the collection. It is a near ally of u P. occidentalis,” hut, I think, 
quite distinct. In general appearance and color they somewhat resemble each other, hut this 
species is smaller, has the bill differently colored, and a conspicuous white mark before the eye. 
The bill differs in shape from that of occidentalis ; the upper mandible being slightly recurved 
(nearly straight), and the outline of the under curving up to it. In “ occidentalis” the outline 
of the lower mandible from the angle to the point is straight. 
All the species of this family resemble each other very much in the coloring of their winter 
dress, consequently such species as approach each other in size are somewhat difficult to be 
distinguished, the most reliable character being the form of the bill. This applies to the 
preceding species and the one now described ; also to P. cornutus and P. cali/ornicus. 
As is is well known, the distinguishing characteristics are the ruffs and crests with which the 
head is ornamented in the breeding season. 
List of specimens. 
Catal. 
No. 
Locality. 
Whence obtained. 
Collected by— 
Length. 
Stretch 
of wing. 
Win . 
Remarks. 
9930 
Chihuahua, Mexico_... 
Major Emory_ 
22. 00 
28. 50 
7 00 
Iris, red_ 
9931 
Santa Barbara, Cal_ 
Lieut. Williamson_ 
Dr. Heermann_ 
7. 25 
4498 
San Pablo hay, Cal_ 
Dr. Newberry_ 
22. 00 
7. 25 
PODICEPS CORNUTUS, Lath. 
The Horned Grebe. 
Colymbus cornutus, Gm. Syst. Nat I, 1788, 591. 
Podiceps cornutus, Lath. Iud. Orn. II, 1790, 783—Box. Syu. 1828, No. 366.— Rich. & Sw. F. B. A. II, 1831, 411. 
Nutt. Man. II, 1834, 254.— Aud. Orn. Biog. Ill, 1835, 429 : V, 1839, 623.— Ib Birds Am. VII, 1844. 
316; pi. cccclxxxi. 
Colymbus obscurus, Gm. I, 592. 
Colymbus caspicus, Gm. I, 593. 
Colymbus nigricans, Scop. Ann. I, 101. 
?Podiceps arcticus, Boie, Tagebuck. 
Sp. Ch —Adult. Upper part of the head, cheeks, throat, and ruff, glossy black ; a broad band running from the bill over the 
eyes, and the elongated occipital tufts behind them yellowish red, deepest in color adjoining the bill; upper surface brownish black, 
the feathers margined with grey; primaries brownish ash, secondaries mostly white, some of the outer ones dark ash; the fore 
