LIST OF PUBLICATIONS. 



[Vol 40 



U. S. Department of Agriculture — Con. 



Scientific Contributions — Con. Page. 

 Si inie Recent Contributions 

 to the Phvsics of the Air, 



W. J. Humphreys 616 



The Dustfall <>f March 9, 

 1918, A. N. Winchell and 



E. R. Miller 616 



Field Crops, A. D. Wilson 



and C. W. Warburton 622 



New Everbearing Straw- 

 berries, W. Van Fleet 639 



Keeping Quality of Straw- 

 berries in Relation to 

 Their Temperature When 

 Picked, N. E. Stevens 639 



I ii corative Materials in the 

 Prickly Pears and Their 

 Allies, D. Griffiths 640 



A Combined Map and Pano- 

 rama for Orientation from 

 Lookout Stations. K. 

 Fritz 6 U i 



Use of Airplanes in Forest 

 Patrol Work, II. S. 

 Graves 641 



Tin- Possibilities Of Farm 

 Woodland I >evelopment 

 under the Smith-Lever 

 Act, C. R. Tillotson 641 



Pulp and Paper Investiga- 

 tions of the Forest Prod- 

 ucts Laboratory in P.»18. 

 V. P. Bdwardes 641 



Pulp Mills df the United 

 states, 1 1. B. Surface and 



F. II. Smith 641 



Effect of < Sertaln Ecological 



Factors on the Morphology 

 of the Uredinlospores "f 

 Puccinia grcminis, K. I '. 

 Stakman and M. N. Le- 



vine 641 



New Biologic Forma "f Pno- 

 cinia graminit, K. C stak- 

 man. M. N. Lex ine, and J. 



G. Leach 642 



The Growth of the Potato 

 Scab Organism at Various 

 Hydrogen Ion Concentra- 

 tions as Related to the 

 Comparative Freedom <>f 

 Arid Soils from the Potato 

 Scab, L. J. Gillespie C<\\ 



A New l disease of the Irish 

 Potato, C. W. ('an- nt.T . 644 



Lightning injury to Herba- 

 ceous Plants, I.. U. Jones 

 and W. W. Gilbert 645 



N ttes on Periderm! ums from 

 Ohio, R. <;. Pierce 645 



U. S. Department of Agriculture — Con. 



Scientific Contributions — Con. Page. 

 Host Relationships of the 

 North American Rusts, 



< Mher Than Gymnosporan- 

 giums, Which Attack Coni- 

 fers. A. S. Rhoads, G. G. 

 Hedgcock, E. Bethel, and 



C. Hartley 645 



Wild Animals of North 



America, K. \Y. Nelson___ 646 

 Wild Life in Our National 



Parks. K. W. Nelson 646 



The Migration of North 



American Birds, VII. II. 



C. Oberholser 



A Second Bird Survey at 



Washington, D. a, H. C. 



< toerholser 646 



Birds Observed near Minco, 



Central Oklahoma, a 



Wet more 646 



i '"-ia's Hummingbird. — 1 1 s 

 • Locality, Early His- 

 tory, and Name, T. S. 

 Palmer 646 



The Wisconsin Napaeosapus, 



II. II. T. Jackson 646 



The Status of the (onus 



Orchllus OabfcaJa, H. C. 



< fcerholser 646 



Mutanda Ornlthologlca, v, 



II. c. Oberholser 646 



First List of the I >ermaptera 

 and Orthoptera of Plum- 

 men Island, Md., and Vi- 

 cinity, W. L. McAtee and 



a. N. CaudeU 649 



-; tartarioa Taken 



at Sea, L. <>. Howard 649 



Notes on the Biology of 



Schistonotm si* boldii, It. 



a. Cushman 649 



The Grape Mealy Bug 



< Ptt udococotu bakeri i. H. 

 L. Nougaret 



The Oriental Peach Moth: 

 a Japanese Fruit Insect 

 R< cently Introduced into 

 the United States. \V. B. 

 Wood • 



A New Coleophora Tn.iuri' 

 to Apple in California. C. 

 Heinrtcfa i 



Two New instances of Poly- 

 embryonj among the En- 

 cyrtidse, L. O. Howard __ 



a Contribution to the Bi- 

 ology "f North American 

 Diptera, < '. T. Greene 



