534 



SUBJECT INDEX 



DooLiTTLE, Alfred, 172. Fenster- 

 MACHER, Lloyd C, 352. Fischer, Louis 

 Albert, 379. Gamble, William 

 H., 428. Hagar, William Valley, 

 244. Ha WES, Charles S., 319. How- 

 ell, Ralph W., 24. Jenney, Walter 

 Proctor, 428. ICarr, Douglas, 244. 

 Latham, Ector B., 220. Lucas, An- 

 thony Francis, 400. McKelvy, E. 

 C, 43. Oberly, Eunice Rockwood, 

 516. Palmer, William, 244. Ravn, 

 F. KoLPiN, 143. Rosa, Edward Ben- 

 nett, 288. Sinclair, C. H., 212. 

 Snell, Merwin Porter, 448, 516. 

 Voorhees, Samuel Stockton, 428. 

 Willis, Arthltr R., 264. Zahm, John 

 Augustine, 516. 

 Oceanography. Electrical conductivity 



method of measuring sea-water salinity. 

 A. L. Thuras. 160. 



Problems of physical oceanography. A. 

 L. Thuras. 132. 

 Optics. tColor and spectral distribution 

 of light. I. G. Priest. 239. 



*Contrast sensibility of the eye and the 

 resolving power of the microscope. 

 F. E. Wright. 311. 



*Dispersion in optical glasses. F. E. 

 Wright. I. 345; II. 374. 



fOptical basis of Bittinger's camouflage 

 paintings. I. G. Priest and M. K. 

 Frehafer. 238. 



fSpectral distribution of energy required 

 to evoke gray sensation. I. G. Priest. 

 396. 



Ornithology. *America, North and Middle, 



birds of. R. Ridgway. 59. 

 *America, South, new birds from Peru, 



Bolivia, Brazil, and Colombia. F. M. 



Chapman. 111. 

 *A. O. U. check-list, fifth annual list of 



proposed changes in. H. C. Ober- 



holser. 497. 

 *Clapper rail, new from Fla. H. C. 



Oberholser. 496. 

 *Cliff swallow, new from Canada. H. C. 



Oberholser. 496. 

 *Crow in relation to agriculture. E. R. 



Kalmbach. 512. 

 *Dove, white-winged, habits of. AlEX. 



Wetmore. 495. 



*Duck, ring-necked, systematic position 

 of. N. HOLLISTER. 61.' 



*Expedition to tropical Pacific in charge 

 of Alexander Agassiz. C. H. Town- 

 send and Alex. Wetmore. 62. 



*Federal protection of migrating birds. 

 G. A. Lawyer. 61. 



fFlight, height of birds'. T. S. Palmer. 

 262. 



*Florida Keys and south end of mainland, 

 birds observed on, in 1919. P. Bartsch. 

 60. 



*Florida redwing, plumage of male. F. 

 C. Lincoln. 111. 



*Flycatcher, Guinea (Myiarchus ferox) 

 races of. H. C. Oberholser. 497. 



*Game preserves, federal and state. E. 

 W. Nelson. 512. 



*Grebes, feeding habit of. Alex. Wet- 

 more. 496. 



*Guano birds of Peru. R. E. Coker. 

 61. 



*Lake Burford, N. M., habits of birds at. 

 Alex. Wetmore. 496. 



*Lanius ludovicianus, new subspecies of> 

 H. N. Oberholser. 62. 



*Larus hyperboreiis barrovianus, status of. 

 H. C. Oberholser. 62. 



*Melanerpes erythrocephalus, new subspe- 

 cies of. H. N. Oberholser. 112. 



*Migration of North American birds. H. 

 C. Oberholser. XI. Canada jay, 

 Oregon jay, Clarke's nutcracker, pinon 

 jay. 113; XII I. European starling, 

 bobolink. 496. 



*Mutanda ornithologica VIII. H. C. 

 Oberholser. 112. 



* Myiarchus ferox, Guiana flycatcher, 

 races of. H. C. Oberholser. 497. 



*North American birds, notes on. 

 H. C. Oberholser. 63. 



*North and Middle America, birds of. 

 R. Ridgway. 59, 512. 



*Otocoris, new from Calif. H. C. Ober- 

 holser. 497. 



§Palmer collection transferred to U. S. 

 National Museum. 500. 



*Pipilo fuscus, new subspecies of. H. C. 

 Oberholser. 60. 



*Protection, federal, of migratory birds. 

 G. A. Lawyer. 61. 



