Index 



431 



Timber, 



feeding habits, 209 

 Raven, 



coloration, protective, 34 

 Rectrices, 



comparison of, 



motmots, 144, 145 

 juvenile, 



duck, (fig. 98A), 249,* 250, 251 

 Pheasants, 



mode of moult, 262, 263 

 Torrent Duck, (fig. 98B, 98C), 249* 

 Redstart, American, 101 

 Reptiles (see "Serpents") 



coloring affected by climate, 3, 5 

 Eutaenia, 3 

 snakes, garter, 



coloring affected by climate, 3, 5 

 snakes, rattle, 

 coloring affected by climate, 3 

 Respiratory system, 



primates, 178-182 

 Rhaciodontinae, 223 

 Rhamphastidae , 



Orinoco group, 112 

 Rhamphocoelus passerinii, 326 

 Rhamphocoeius passerinii, Bonap., 343 

 Rheinardius, 264 

 Rhineodon punctatus, 367 

 Rhineodon Typus Smith, 349-389 

 Rhino chilus, 221 



eggs of, 321 

 Rhinodon pentalineatus, 367 

 Rhino dontidae, 368 

 Rhynchops nigra cinerascens, 74 

 Rhychocyclus flaviventris flaviventris, 



96 

 Ridgway, 

 quoted on : 



birds with abnormal toes, 151 

 Yucatan Jay, 153 

 Rifargia occulta, 131 

 Rifargia onerosa, 131 

 Rifargia phanerostigma, (new species), 



125,* 131 

 Ring-necked Snake, 221 

 Ringhals, 



food of, 226 

 Robin, 

 Bare-eyed, 100 

 Bonaparte Tawny, 327 

 captive, 



melanism of, 16 

 White-throated, 100 

 Rollulus, 263 

 Rookery, 



seals, elephant, 



Guadalupe Island, 162 



Rothschild, Walter, (Hon.), 

 quoted on : 



Mirounga angustirostris, 161 

 Ruddy Duck, (see "Ducky, Ruddy") 

 Rupornis magnirostris, 80 



Saccopleura lycealis (new species), 



133,* 133 

 Salvadora, 



distribution of, 219 

 food of, 217 

 Salvin and Godman, 

 quoted on : 



Yucatan Jay, 153 

 Saltator magnoides medianus, 327 

 San Cristobal Bay, 



elephant seals, 160 

 Sandpiper, 69 

 solitary, 74 

 spotted, 75 

 Sapphire, The Lesser, 86 

 Sarcoramphus papa (Linn.), 329, 330 

 Saturniidae, 125 

 Scammon, 

 quoted on : 



proboscis of elephant seal, 166 

 seals, size of, 163 

 Scansores, 89 

 Scardafella, 

 eye, 



pigment of choroid coat increased 

 by humidity, 30, 31 

 Feathers, tail, 25* 

 melanism, experiments in, 21-38 

 plumage, variation of color, 22-25 



table listing different localities, 22 

 primaries, 



color variation in different locali- 

 ties, 22 

 Scardafella inca, 21, 31,* 35* 

 humidity, effect of, 25-31 

 primary change of coloration area, 

 humidity as factor, 26, 27 

 Scardafella inca dialeucos, 21, 31, 35* 

 Scardafella ridgwayi, 21, 31,* 35* 

 Scardafella ridgwayi brasiliensis, 21, 



31,* 35* 

 Scarlet snake, (fig. 78), 200 

 Schistochalmys atra, 103 

 Schoenobiinae, 134 

 Scincidae, 



food of, 229 

 Sciurus, 69, 327 

 Sclater, P. L., 

 quoted on : 



Hoatzin, distribution of, 50 

 Hoatzin, odor of, 62 



