4 DEPARTMENT OF AGRICULTURE BULS. 251-275. 



Department Bulletin No. 255. — Douglas Fib Pitch Moth — Continued. Page. 



Relation to other destructive insects 17 



Relation to natural enemies 18 



Means of control 18 



Summary and conclusions 21 



Synoymy ' 23 



Literature consulted 23 



Department Bulletin No. 256.— Katydids Injurious to Oranges in 

 California: 



Introduction 1 



The fork-tailed katydid 1 



The angular-winged katydid 14 



Control of katydids on oranges J . . 20 



Recommendations ^ J 24 



Department Bulletin No. 257. — Progress Reports of Experiments in 

 Dust Prevention and Road Preservation, 1914: 



Experiments at Lemdn City, Fla 1 



Experiments at West Palm Beach, Fla 7 



Supplementary report of experiments at Miami, Fla. ', 1913 16 



Supplementary report of experiments on Rockville Pike, Maryland, 1913 . . 17 



Supplementary report of experiments at Washington, D. C, 1912... 22 



Supplementary report of experiments at Chevy Chase, Md . , 1912 25 



Supplementary report of experiments at Chevy Chase, Md., 1911 project. . 29 



Supplementary report of experiments made at Jamaica, N. Y., 1911 34 



Supplementary report of experiments made at New York, N. Y., and 



Ridgewood, N. J., 1910 37 



Supplementary report of experiments made at Boise, Idaho, 1910 37 



Supplementary report of experiments made at Ames, Iowa, 1910 38 



Supplementary report of experiments made at Knoxville, Tenn., 1910 39 



Supplementary Report of Experiments made at Youngstown, Ohio, 1909. . 40 



Supplementary Report of Experiments made at Newton, Mass., 1908 42 



Supplementary Report of Experiments made at Garden City, Dodge City, 



Bucklin, and Ford, Kans., 1908 . 43 



Supplementary Report of Experiment made at Bowling Green, Ky., 1907. 44 



Department Bulletin No. 258. — Lessons in Elementary Agriculture 

 for Alabama Schools: 



Introduction 1 



September 2 



October 6 



November .-.- 11 



December 16 



January 20 



February 23 



March 27 



April 32 



Department Bulletin No. 259. — Studies on Changes in the Degree of 

 Oxidation of Arsenic in Arsenical Dipping Baths: 



Introductory -.- 1 



. Field Experiments of 1913 3 



Laboratory Experiments 6 



Field Experiments of 1914 11 



General conclusions 12 



Department Bulletin No. 260. — The Dog as a Carrier of Parasites and 

 Diseases: 



Diseases and parasites carried by the dog 2 



Conclusion 24 



Publications of U. S. Department of Agriculture relating to carriers of 



diseases 27 



Department Bulletin No. 261. — American Plum Borer: 



Introduction. 1 



History. 2 



Distribution 2 



Food plants 3 



Feeding habits and character of injury 3 



Description of stages . 3 



Spring pupation of wintering larvae 5 



