PODICIPIDE. — CXXIV. 215 
Famiry CXXTV. PODICIPIDAS. (Tue Greses.) 
Bill slender, or stout; lores naked ; head often with crests, ruffs 
or ear tufts in the breeding season. Under plumage dense, lustrous, 
mostly white. Wings very short; tail rudimentary, without dis- 
tinct quills. Feet four-toed, lobate, the toes webbed at base; toes 
flattened, provided with flat claws resembling human nails; tarsus 
seutellate, compressed. Genera 2; species about 20; in all parts 
of the world, chiefly about fresh waters; nest usually a floating 
mat of rushes. 
a. Bill slender, straight, rather acute; its length more than twice its depth 
at base ; head in breeding season with conspicuous crests or ruff. 
6. Neck nearly as long as body. . . . . . » . diCHMOPHORUS, 318. 
bb. Neck much shorter than body. . . . . « . . «. Coxymsus, 319. 
aa. Bill stout, somewhat hooked; its length not quite twice its greatest depth; 
no ruff nor.crest.. . 2 + © © © © © + « » Poprtymsus, 320. 
318. ZICHMOPHORUS Coues. (aixpuy, spear; hdpos, bearing.) 
626. 28. occidentalis (Lawrence). WESTERN GREBE. Slate- 
color ; satin-white below. L. 26. W. 8. B. 23. Minn. to Mexico 
and W. 
319. COLYMBUS Linnzus. (koAvpPos, diver.) 
a. Bill about as long as head. (Colymbus.) 
627. C. holbolli (Reinhardt). Rep-NEcKED GREBE. Upper 
parts brown; front and sides of neck brownish red; head ashy 
gray, its top blackish; crests and ruffs not large; below silvery, 
the feathers gray within. L.18. W. 8 B. 2. N. Am, U.S. 
in winter. (To the Danish naturalist, C. Holbdll.) 
aa. Bill much shorter than head. (Dytes Kaup.) 
628. C.auritus L. Hornep Grese. Dark brown; head glossy 
black in ¢; a buffy patch above and behind eye; fore-neck, 
breast and sides brownish red ; bill compressed, deeper than wide 
at base, black, tipped with yellow; ruffs very large, in dense tufts. 
L.14. W.6. B. 3% N.U.S.and N. (£u.) (Lat., having 
large ears.) 
629. C. nigricollis (Brehm). Earrep Gree. Crest of ¢ in 
the form of a fan-shaped patch; head, throat and breast black in 
&; bill depressed, wider than deep at base. L.13. W. 5}. 
Northern regions, the American var. californicus Heermann (W. 
U.S., E. to Ill), with inner webs of inner quills dusky. (£u.) 
(Lat., niger, black ; collum, neck.) 
320. PODILYMBUS Lesson. (Podiceps-Colymbus.) 
630. P. podiceps (L.). Dreparrer. Das-cuick. HELL-DIVER. 
Water Witcu. Prsp-BILLED GrEBE. Chiefly brownish gray ; 
silvery ash below, spotted with dusky; chin and throat black; bill 
