3 



82.4- 



Div. Insects , 

 U. S. Nat MuaS 



hi* 



/ 



PREFACE. 



r rhe second ' l . ions and Beneficial Insects of Cali- 



fornia" lias the request of Dr. A. J. Cook, State 



Commissioner of Hortii . to meet the many demands for the 



first edition, which was exhausted soon after its appearance as Nos. 1 

 and 2, Vol. II. The Monthly Bulletin of the State Commission of 

 Horticulture,' January ;n>,i February, 1913. Since that time the 

 author has made many adoptions And corrections so that the present 

 work is very much larger than me first. While the general scope 

 of the publication is practically the same, many insects of minor 

 importance have also been included, because of the demands upon the 

 commissioner's office concerning them. Housebold insects and those 

 attacking domestic animals are largely omitt^l, not because they 

 are any less important than many that are inclu led, but because time 

 and space would not permit of the larger undertaking. 



The arrangement is systematic, following the classification of 

 insects rather than of host plants so nly used in recent works 



of economic entomology. This was dom with the desire of making it 

 possible for the reader to acquire a comprehensive knowledge 



of the relationships of insects, wh ms the basis of all real intel- 



ligent methods of control. The host plant index in the front permits 

 one to readily follow out the host plant arrangement if so desired. 



The work is intended primarily for fruit growers and farmers and 

 technicalities are avoided wherever not absolutely necessary, but it is 

 hoped that entomologists may find it of some value also. 



The writer has drawn freely from all available sources of systematic 

 and economic entomological literature and especially from the bulle- 

 tins of the Bureau of Entomology, United States Department of 

 Agriculture, of the United States National Museum, of the California 

 Agricultural Experiment Station and the agricultural experiment sta- 

 tions of other states; from such publications as the Annals of the 

 Entomological Society of America, The Journal of Economic Ento- 

 mology, The Monthly Bulletin of the California State Commission 

 of Horticulture, Entomological News, Canadian Entomologist, The 

 Pomona College Journal of Entomology and Zoology, The Review 

 of Applied Entomology, and publications of a similar nature; from 

 such works on entomology as "Injurious Insects of the Orchard; 

 Vineyard, Etc.," by Matthew Cooke; "Insect Pests of Farm. Garden 

 and Orchard," by E. Dwight Sanderson; "Biennial Crop Pest and 

 Horticultural Report of the Oregon Agricultural College Experiment 

 Station (report of the Department of Entomology ). 1911-1912 and 



