KEY TO THE GENEP.A. " 63 



(p) Hintl too simjjle ; head crested, and narrow tip of bill fovmcd wholly by the nail, Aix 259 



— not crested; bill 7mfcft wider iit end than at base, Spatula 258 



— not wider; tall ouneate, ^ or more of the wing, . . Dafila 253 

 — not ouneate, not i the wing, (p-) 

 (p2) Bi]I<head; crown Btreaked; tl. fthrs lanoe-acute; ? and yg. of . Dafila 253 

 — creamy or white; speouhim green, Makeca 255 



— about = h<l.; speculum white : wing coverts chestnut, Chaulelasmtjs 254 



— little:=:-hd. 8peculLtui violet, black and white bordered, .... Anas 252 



— green; wing coverts sky blue, . Quekqijeuula 257 

 — not blue, . . . Nettion 256 



(p) llind toe ?u?j«Z,- clieek.^ bristly. Colors black and white, Camftol-tcmus 264 



t;iil_/jo-/»ierf; in the rtf;M/( = or>wing; bill black and orange, Hakelda 2(;3 



— rounded, the feathers stilT, lance-linear, exposed to their bases, , . EuismaTura 270 



— Ducks with none of tlie foregoing characters, fp^) 



(p^) Up. niand. f/iVj&ows at its unfeathered base. Black or brown, CEdemia 269 



— not gibbous where unfeathered; nail narrow, distinct, (p*) 



— broad, fused, {p""') 

 (p') Head black or gray, with white ; nost. nearly median ; b. about^tre., Bucephala 2(12 



— reddish or brownish, no white; nost. nearly median; b.>-tr6., . ArxilYA 261 



— black or brown; nost. subbasnl ; b.>trs., FtiLix 260 



(p"') Feathers not extending on culracn ; bill barely tapering to tip, . . POLYSTICTA 26G 



— much tapering to tip, . . Histkionicus 265 



— extending on culm., and partly on sides of upper mand., . Somateiita 268 



— ejitirely on sides of up. mand., . Lampkonetta 267 



(C) Forehead naked, with a large horny plate formed by extension of culmen, Fulica 245 



— feathered; lores feathered; tail perfect; bill flattened, membranes scolloped, Fualauopus 200 



— subulate, membranes scolloped, . . Lobipes I'JO 



— subulate, membranes plain, . , Stegasopus 108 

 — naked; ta.il,none; forehead bristly ; bill epiguathous, . . . Podilvmbus 315 



— soft; bUl paragnathouB. (q) 



(q) Tarsus =middle toe and claw. Birds 20 inches, or more, long, zEcniioPHOEUS 312 



— < middle toe and claw. Birds from 12 to 19 inches long, Podiceps 313 



Birds under 12 inches long, SylbeuCyclus 314 



(D) Middle claw pecii««^e; 4t. 4-jointed; It. lateral; tail rounded; long rictal bristles, .. Axtrostomtjs 114 



— forked; short rictal bristles, . . Chokdeiles 115 

 (D) Mid. claw not pectinate ; head naked ; nostrils imperforate ; naked leg and foot < tail, . Meleagris 177 



— perforate; naked leg and foot < tail, . . Cathautes 166 



— perforate; naked leg and foot :> tail, .... GiiUS 223 

 — feathered; nostrils feathered, or overhung by a scale, in deep 



fossa of stout, hard bill, (r) 



— not feathered nor scaled, in long groove of 



slender softish bill, (s) 

 (r) Toes feathered; tarsi and nasal fossre; feathered. Plumage pure white in winter, .... Lagopus 183 



— naked;— tarsi feathered, part way down ; tail of 18 soft broad feathers, Bonasa 182 



— to the toes; tail of — 20 stiff acuminate feathers, . . . Centrocercus 179 



— 20 or 16 soft broad feathers, Teteao 178 



— ISfthrs; neck with lanceolate feathers, Cdtidoxia 181 



— without such feathers, Pedkecetes 180 

 — naked; tail nearly = wing; crest — slender, clubbed, recurved, . . Lopiioktyx 186 



— full, soft, depressed, Calltpepla 187 



— 5 to I tbe wing; crest — long, sti-aight, filamentous, . . . Oreortyx 185 



— full, soft, depressed, Cyrtonyx 188 



— rudmientary or none, Ortyx 184 



(s) Trs. entirely reticulate; hind toe minute ; bill straight, not :=> head, Squatarola 189 



— scutellate in front only; bill much ::::- hd. very slender, decurved, Numenius 222 



— barely >hd., comparatively stout, straight,. . . ITeteroscelus 221 



— and behind; tl. not barred; one minute web; primaries mottled, Tryngites 220 



—2 plain webs; b. <, or about=hd., Ereunetes 206 



— much > hd., Micropalama 205 



— tl. barred crosswise with light and dark colors, (s^) 



(s=) Gape not reaching beyond base of— furrowed culmen. Under a foot long, . MACRORnAMPiius 204 



— unfurrowed culmen. Over a foot long, LinrosA 213 



(s^) Gape longer. Length < in.; 2t. unwebbed; bill grooved nearly to tip, Tringoides 217 



— about half-way to tip, Rhyacofhilus 216 

 — >"9iu.; b. not >- hd., grooved 5 its length; tl. about = 4 the wg., Actiturus 210 



— not=^thewing, PinLOMAUiius 21S 



— >-head; 2t. webbed: legs not green or yellow, Symphemta 214 



— barely or not webbed ; legs green or yell., Gloxtis 215 



