BUREAU OF ENTOMOLOGY. 531 



The work against tobacco insects will be continued and expanded, 

 and experiments in the control of the sugar-cane borer will be con- 

 ducted on a larger scale. The study of the rice weevil will be carried 

 on further, and the work on the Argentine ant and the cotton red 

 spider will also be continued along the same lines as during the 

 previous year. 



With forest insects, the demonstration work in the Northwest will 

 be expanded, and a strong effort will be made to secure the coopera- 

 tion of the timber owners in the South in order to carry on effective 

 work against the southern pine beetle. 



With deciduous fruit insects, several of the investigations recently 

 begun and already indicated will be continued. Codling-moth studies 

 are planned for the Southwest in addition to the work in the Alle- 

 gheny IMountain region. The plum-curculio investigations will be 

 practically concluded in the season of 1911. A specific study of the 

 insect enemies of nuts on the tree will be begun in the South and will 

 be later extended to the Pacific coast. Work on the woolly apple 

 aphis and the apple-tree borers will be given considerable attention, 

 and if practicable it is planned to be^in a specific study of the insects 

 damaging nurseries and of the efficiency of hydrocyanic-acid gas 

 fumigation as practiced by nurserymen on deciduous fruit-tree nurs- 

 ery stock. The grape Phylloxera investigations will be continued, 

 and more demonstration work will be given to the pear thrips in 

 California, 



AVith cereal and forage insects, the same problems will continue 

 under investigation, and especial attention will be paid to the alfalfa 

 weevil, which continues to spread and for which no satisfactory 

 remedy has yet been found. 



With insects affecting vegetable crops, the work of the past fiscal 

 year will be carried on upon practically the same lines. 



With insects affecting citrus crops, the fiscal year 1912 should com- 

 plete the white fly investigation, except in so far as further efforts 

 will be necessary to introduce and establish the parasitic and pre- 

 daceous enemies of the white fly discovered in central India. The 

 work with different oily, soapy, or other sprays, carried on experi- 

 mentally and also on orchard or demonstration scale, should be com- 

 pleted during the coming winter. Some special investigations of 

 newly discovered citrus and subtropical pests in Florida will be 

 undertaken, and the investigation of the orange thrips will be con- 

 tinued. 



Under the head of " Insects in their direct relation to the health 

 of man and domestic animals," the work on the spotted-fever tick of 

 the Northwest will be concluded in the autumn. The United States 

 Public Health and Marine-Hospital Service has taken up this work 

 at the request of the State Board of Health of Montana and the serv- 

 ices of the bureau will be no longer needed. Work on the southern 

 cattle tick and other southern ticks will be continued, however, and 

 such experimental work as can be done with the house fly and mos- 

 quitoes will be carried on. 



There will be no great innovations in the work on insects injurious 

 to stored products, and the inspection work will be continued as 

 thoroughly as ])ossible in the absence of a national law. 



In bee culture, the increase in the appropriation makes it possible 

 to take up certain lines of work which have been much needed. The 



