KEY TO THE GENERA. 



TOES 3,-2 IN FRONT, 1 BIOIIIND PiCOTDK.H 132 



TOES 3,— 3 IN FRONT. (II.) 



TOES 4,-2 IN FRONT, 2 IIKIUND. (III.) 



TOES 4,-3 IN FROJs^T, 1 BEHIND. (IV.) 



II, [toes 3,-3 IN FRONT.] 



Toes incomplete! i/^ or not loehbed. (a) 

 Toes completely webbed, (d) 



(a) Xaked leg and foot together about wing. Bill subulate; one basal web Himantopus 197 



— much<the wing-, (b) 



(b) Bill mucli:>tarsus, truncate at tip; trs. reticulate. Birds over 13 inches long, . . . Hjematofus 104 



— much<^, or about^trs. Birds under 12 iuclies long, (c) 



(c) Tarsus in front scutellate, about=bill, " Calidrts 212 



— reticulate, > bill; plumage speckled Charadrius 190 



— not speckled; trs. nearly twice = :jt., Fodasocys 192 



— notnearly twice = 3t., .... JEgialitis 101 



(d) Nostrils tubular; sides of under mandible not sulcate, DiOiiEDEA 290 



— with a long colored groove, Pikebetria 297 



— not tubular (linear, oval, etc.) (e) 



(e) Nostrils nated; eyelids horny ; both mandibles sulcate. Not crested Fratercula 318 



— simple. Birds>- 12 lung; up. mand. sulcate. Crested, Lunda 319 



— not sulcate. Crested, . . . Ceratoriiina 320 

 — <12 long; un. mand. falcate, up. mand. oval, . . Phaleeis 321 



— not falcate; up. mand. wrinkled, . PTrCHORiiAJiFHUS 323 



— smooth, . . . SlJIORH-TNCIIUS 322 



(e) Nostrils incompletely feathered; tail nearly even; b. and trs. compressed, . Synthliboriiamphds 325 



— gradated; bill and tarsus not compressed, .... Mergulus 324 



(e) Nostrils completely feathered; tarsus in front reticulate. Birds under 12 long, . BRACHTitHAMnius 32G 



— 12 or more long, . , . IJRIA 327 



— scutellate; b. not snlcate or cultrate, .... Lomvia 328 



— sulcate. Bird<24, . . . Utamania 317 

 Bird > 24, Alca 316 



III. [Toes 4, in pairs, 2 in front, 2 behind.] 



Bill with a cere, and strongly epignathous; tarsus granulated Conurus 1.38 



— notcered; inner hind toe with 3 joints; plumage iridescent, Trogon 125 



-only 2 joints, (f) 



(f) Tail of 8 feathers; upper mandible sulcate; sides of head partly naked, Crotophaga 12G 



— 10 soft feathers ; tar5us>-middle toe and claw; lores bristly; birds about 2 feet long, Geococcvx 127 

 — < middle toe and claw; lores soft; birds about 1 foot long, . CoccYZus 128 

 — 12 {apparently only 10) rigid acuminate feathers, (g) 



(g) Birds >• 14 inches long, conspicuously crested; bill and nasal feathers not dark, . . . Campephilus 120 



— dark, . . . Hylotomu8 130 



(g) Birds<lt in.; ridges on up. mand. reaching tip; tongue acute, barbed. No yellow, .... Picus 131 



— ridges running into tomium; tongue obtuse, brushy. Some yellow, . Sphyrapicus 133 



— ridges wanting, or indistinct and not reaching tip or tomia. (g=) 



(g2) plumage of belly bristly, of back with metallic iridescence, .... Asyndesmus 136 



— normal, with many round black spots, Colaptes 137 



— not spotted; not white, Centurus 134 



— white, Melanerpes 135 



(Gl) 



