ir on ey at ge ee ee 
KEY TO THE GENERA. 
ELOHSa55-— 2 IN PRONTO BEHIND. « : s «86 + « 6 « 8s « « « Proormrs 132 
TOES 3,—3 1n Front. (II.) 
TOES 4,—2 IN Front, 2 BEHIND. (III.) 
TOES 4,—3 IN FRONT, 1 BEHIND. (IV.) 
II. [rors 3,—3 IN Front. ] 
Toes incompletely, or not webbed. (a) 
Toes completely webbed. (da) 
(a) Naked leg and foot together about wing. Bill subulate; one basalweb. . . . . . HIMANTOPUS 197 
—much<the wing. (b) ‘ 
(b) Bill much> tarsus, truncate at tip; trs. reticulate. Birds over 12incheslong, . . . H@MATOPUS 194 
—much<, or about=trs. Birds under 12inches long. (ce) 
(c) Tarsus in front scutellate, about=bill, LEM ace etticme sauce cts) “enc is “OAL RES. 2 Le, 
—reticulate, > bill; plumage apeckled, operate + « « » « « CHARADRIUS 190 
— not speckled; trs. nearly twine ate tise) OD AROG RE Lo7, 
—notnearly twice-=at., + « - « ANGIALITIS 191 
(d) Nostrils tubular; sides of under mandible not suleate,. . ... . . . . +...» + « DIOMEDEA 296 
—with along colored groove,. .. . . . . PH@BETRIA 297 
—not tubular (linear, oval, etc.) (6) 
(e) Nostrils naked; eyelids horny; both mandibles suleate. Not crested . » « » » . FRATERCULA 318 
—simple. Birds>12 long; up. mand. sulcate. Crested, . .. . . . LUNDA 319 
—not suleate. Crested, . . . CERATORHINA 320 
—<12 long; un. mand. faleate, up. mand. oval, . . PHALERIS 321. 
- —not faleate; up. mand. wrinkled, . PTrYCHORHAMPHUS 323 
—smooth,. . . SIMORHYNCHUS 322 
(e) Nostrils incompletely feathered; tail nearly even; b. and trs. compressed, . SYNTHLIBORHAMPHUS 325 
—gradated; bill and tarsus not compressed, . . . - MERGULUS 324 
(6) Nostrils completely feathered; tarsus in front reticulate. Birds under 12long, . BRACHYRHAMPHUS 326 
; —12ormorelong, ... . URIA 327 
—scutellate; b. not sulcate or cultrate,. . . . LOMVIA 328 
—suleate. Bird<24, . . . UTAMANTA 317 
Bird>24,. .. . . ALCA 316 
III. [Tors 4, iy pairs, 2 IN FRONT, 2 BEHIND. ] 
Bill with a cere, and strongly epignathous; tarsus granulated,. . . .... + + + « + +» CONURUS 138 
—not cered; inner hind toe with 3 joints; plumageiridescent, ...... .. +. . . TROGON 125 
—only 2 joints. (f) 
(f) Tail of 8 feathers; upper mandible sulcate; sides of head partly naked, . . . . . . CROTOPHAGA 126 
—10 soft feathers; tarsus>middle toe and claw; lores bristly; birds about 2 feet long, GEOCOCCYX 127 
—< middle toe and claw; lores soft; birds about 1footlong, . Coccyzus 128 
—12 (apparently only 10) rigid acuminate feathers. (g) 
(g) Birds > 14 inches long, conspicuously crested; bill and nasal feathers not dark, ., . . CAMPEPHILUS 129 
—dark,.. . HyYxLoTomus 130 
(g) Birds << 14 in,; ridges on up. mand. reaching tip; tongue acute, barbed. No yellow, . . . . Purcus 131 
—ridges running into tomium; tongue obtuse, brushy. Some yellow, . SPHYRAPICUS 133 
—ridges wanting, or indistinct and not reaching tip or tomia. (g*) 
(g?) 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 
(61) 
