16 PROTECTION' OF PLANTS, 1917-18 



But the greatest and most far-reaching development has taken place in con- 

 nection with the Dominion Service. On the death of Dr. Fletcher in 1908 the 

 Division of Entomology and Botany was made into two, each with its own staff 

 of officers and workers. It is unnecessary for me to tell this Society how these 

 Divisions have grown during the ten years of their separate existence, how field 

 stations have been established in every province, and how problems are being 

 studied by specialists in the open field. For details regarding the activities of 

 these two branches I would refer you to Dr. Hewitt's Presidential Address, 

 Ontario Entom.ological Society 1915, and to Mn Gussow's article in last year's 

 report of this Society. 



The development of these two economic branches of science in the United 

 States Department of Agriculture during the last decade has also been truly 

 marvellous. The corps of scientific workers numbers nearly a thouasnd, and the 

 problems that are being investigated are manifold. 



'A characteristic feature of recent progress has been the publication of a large 

 number of excellent text and reference books. Ten years ago economic works 

 dealt rather generally, or vaguely and indefinitely, with the forms discussed, and 

 details were to a large extent wanting. Recent works are more specific in their 

 treatment, as for example the Manuals prepared by Slingerland and Crosby on 

 Fruit Insects, by Herrick on HoiiseJwld Insects, by Sanderson on Farm, Orchard 

 and Garden Pests, by Riley and Johannsen on Medical Entomology, by Herms 

 on Parasitic Entomology. These works represent the results of many observers 

 in all parts of North America who are studying the pests intensively, their results 

 having first appeared, usually in bulletins or in periodicals. 



In Systematic Entomology also several works have appeared that are of 

 great value to the economic investigator, namely Blatchley's Coleoptera of In- 

 diana, Blatchley and heng's Rhynchophora of North ^wmca, Aldrich's Sarcophaga 

 and Allies, Brues and Melander's Key to the Families of North American Insects, 

 Barnes and McDonnough's Check List of the Lepidoptera of Boreal America, 

 and VanDuzee's Catalogue of the Hemiptera of America North of Mexico. Lutz's 

 Field Book of Insects, Needham and Lloyd's Li/"^ of Inland Waters, and Ward and 

 Whipple's Fresh Water Biology just recently published are valuable aids to the 

 student who desires to pry into the secrets of Nature in the open. Folsom's 

 Entomology ivith reference to its Biological and Economic Aspects is most valuable 

 as an introduction to the anatomy, physiology and ecology of insects. It leads on 

 to Packard, Henneguy, Newport and Lyonnet. 



The Journal of Economic Entomology and the Annals of the Entomological 

 Society of America began publication in 1908, the year of the organization of our 

 own Society. 



