15 



3. Prof. Thomas takes all the region east of the mountains not enumerated, including^ 

 Nebraska, Minnesota, etc. 



The publications will consist of circulars, bulletins, memoirs, and the annual report of 

 doiuffs and results of the work of the Commission. 



To Prof Riley are assii^ncd more piirticuhirly the followinir divisions of the subject : 

 Bioloiry, or Natural History ; Insect Enemies and I'arasites ; Remedies and Devices for De- 

 struction. 



To Dr. Paokard : Anatomy and Embryology. 



To Dr. Packard and Prof. Thomas, conjointly : Meteorological Bearings and Migrations. 



To Prof Thomas : Geographical Distribution, Enemies not Entomological, Agricultural 

 Bearings of the Subject. 



Tlie Commij-sion exjiects to secure co-operation with the United States Signal Bureau 

 iu aiFording meteorological data in connection with a study of the migrations of the locust ; 

 also, hopes to secure the aid of the Canadian Government in co-operating with it in its inves- 

 tigation in British America. 



It is the determination of the Commission to confine its operations more particularly to 

 the practical bearings of the subject, with a view to ascertain all po.ssible remedies against 

 these destructive insects. All else will be made subservient to the great object for which the 

 a]ipropriation was made, to wit : — 



1. The best means of fighting the plague as it occurs in the States to which it migrates, 

 but in which it is not indigenous. 



2. The thorough investigation into its habits in its native homo, with a view of prevent- 

 ing, if possible, its migrations therefrom. 



The fnllowing are the topics on which data are requested from observers in all parts in 

 reference to the destructive locust : — 



1. Date, and time of day of the arrival of swarms. 



la. Directinn and force of the wind at the time. 



\b. Temperature and character of the weather at the time (clear or cloudy). 



If. Direction of the flight, density, height and extent of the .swarms. 



2. Date and time of day of the departure of the .swarms. 



'III. Direction and furce of the wind at the time. 



'2/'. Temperature and character of the weather at the time. 



2c. Direction of the flight, density and extent of the swarms. 



3. Date when the first eggs, if any, were deposited the present year. 



4. Date when the eggs were most numerously hatching the present year. 

 .'3. Dale when the eggs were most numerously hatching in previous years. 



li. Proportion of eggs that failed to hatch the present year, and j)robable causes of such 

 failure. 



7. Nature of the soil and situations in which ihe eggs were most largely deposited. 



8. Nature of the soil and situations in which the young were most numerously hatched. 

 'J. Date at which the first in.sect accjuired full wings. 



10. Date when the winged insects first began to migrate. 



11. Estimate the injury done in your County and State. 



12. Crops which sutl'ered most. 



13. Crops most easily protected. 



14. Crops v»liieh sufl^ercd least. 



15. The jirevailing direction in which the young insects travelled, and any other facts in 

 relation to the marching of tlie young. 



10. The means employed in your section for the destruction of the unfledged insects, or to 

 protect crops from their ravages, and how far these have proved satisfactory. 



17. The means employed in your section for the destruction of the winged insects, or to 

 protect crops from their ravages, and how far these have proved satisfactory. 



18. llescription, and, if possible, figures of such meehanical contrivances as have proved 

 useful in your locality for the destruction of cither the young or the winged insects. 



11). If your section was not visited in l!s7tJ, plca.se state this iiict. 

 20. If visited any previous year, please give the dates. 



