524 



AUTHOR INDEX 



*Guiana flycatcher, myiarchus ferox, 



races of. 497. 



*Lanius ludovicianus , new subspecies 



of. 62. 



*Larus hyperboreus barrovianus, sta- 

 tus of. 62. 



*Melanerpes erythrocephalus, new sub- 

 species of . 112. 



*Migration of North American birds, 



XI. : Canada jay, Oregon jay, Clarke's 

 nutcracker, pinon jay. 113; XIII.: 

 European starling, bobolink. 496. 



*Mutanda omithologica VIII. 112. 



*North American birds, notes on. 



63. 



*Otocoris, new from Cal. 497. 



*Pipilo juscus, new subspecies of. 



60. 



*Quiscalus quiscula, races of. 62. 



*Washington, all-day bird trip at. 



112. 



— • — • *Washington region (birds of) Oct.- 

 Nov. 1919. 512. 



*Waterfowl in Neb. 495. 



Pack, R. W. *Sunset-Midway oil field, 

 Cal., Part I. 58. 



Paige, Sidney. fMoon craters, interpre- 

 tation of. 422. 



fStructure of the Homestake ore 



body. 446. 



Palmer, H. E. fLactic acid in biological 

 mixtures. 40. 



Palmer, Harold S. *Ground water in 

 Norwalk, Suffield and Glastonbury 

 areas. Conn. 510. 



Palmer, T. S. jHeight of birds' flight. 

 262. 



Pardee, J. T. Bementite and neotocite 

 from western Washington; identity of 

 bementite and caryopilite. 25. 



*Phosphate rock near Maxville, 



Mont. 393. 



Parsons, Charles R. fAmmonia, oxi- 

 dation of. 42. 



Parsons, S. R. Radiators for aircraft 

 engines. 409. t513. 



Peters, C. G. t^ental materials, physi- 

 cal properties of. 37. 



Phelps, I. K. fLactic acid in biological 

 mixtures. 40. 



Pierce, C. H. *Surface waters of Vermont. 

 137. 



PiTTiER, Henry. Bursera, new species of. 

 229. 



Swartzia in Panama and Guatemala. 



155. 



Ports, P. L. *Natural gas resources avail- 

 able to cities of Texas. 193. 



Power, E. B. fOdorous principles of 

 plants. 41. 



Price, W. Armstrong. Brachiopod, shell 

 regeneration in. 32. 



Priest, I. G. fColor and spectral dis- 

 tribution of light. 239. 



fOptical basis of Bittinger's camou- 

 flage paintings. 238. 



fSpectral distribution of energy re- 

 quired to evoke gray sensation. 396. 



Quaintance, a. L. *Aphids injurious to 

 orchard fruits, current, gooseberry and 

 grape. 192. 



Ramsay, William. fAnatolia, archeologi- 

 cal retrospect and prospect in. 23. 



Ransome, E. L. *Copper deposits of Ray 

 and Miami, Ariz. 57. 



Ravn, E. Kolpin. fCooperation between 

 entomologists and plant pathologists. 

 142. 



Rawdon, Henry S. *Lead, intercrystal- 

 line brittleness of. 312. 



Reed, Lowell J. Correlation between 

 functions, and spurious correlation. 

 449. 



Reeside, John B. jCarboniferous and 

 Triassic of southwestern Utah. 445. 



*Coal in San Juan County, N. Mex. 



419. 



Reeves, Erank. * Geology of the Cement 

 oil field, Caddo Co., Okla. 510. 



Reynolds, Walter E. *Plane rectangu- 

 lar coordinates and geographic posi- 

 tions. 440. 



Richardson, Edward E. §Philosophic 

 aspects of Einstein's theory of relativ- 

 ity. 448. 



RiDDELL, C. W. *Water exploratory drill- 

 ing for, and use of ground water for ir- 

 rigation in Steptoe Valley, Nev. 442. 



RiDGWAY, Robert. *Birds of North and 

 Middle America. 59. 



* Birds, new genera of. 512. 



