SYNOPSIS, CATALOGUE, AND BIBLIOGRAPHY OF NORTH 

 AMERICAN THYSANOPTERA, WITH DESCRIPTION OF 

 NEW SPECIES. 



INTRODUCTION. 



The many recent publications on American thrips, and especially 

 the descriptions of new species with their added notes, have con- 

 stantly impressed the writer with the need of a catalogue of these 

 already known species, with references to their habitat and food plants 

 and to notes on their life history. The writer is also impressed with 

 the need, for future workers, of a uniform method in describing 'new 

 species. 



Several English and European entomologists have published 

 extensively on European thrips, but it is only within the last decade 

 that American writers have given more than passing notice to these 

 insects. Several species of injurious thrips, in both the East and 

 West, have been carefully studied, and these economic problems, it 

 seems, have been largely the incentive for the other, the systematic 

 work. The grass thrips {Anaphothrips striatus Osborn), the straws- 

 berry thrips (Euihrips tritici Fitch), the onion thrips {Thrips tabaci 

 Lindeman), the tobacco thrips {Euihrips fuscus Hinds), the green- 

 house thrips {Heliotfirips liaemorrhoidalis Bouche), the bean thrips 

 {Heliothrips fasciatus Pergande), the orange thrips {Euihrips citri 

 i\ioulton), and lastly the pear thrips {Euihrips injn Daniel) are all 

 examples of what serious pests this group includes. Already many 

 agents of the Bureau of Entomology of the United States Depart- 

 ment of Agriculture and various State and county workers have spent 

 much time and money in learning the habits of these several inju- 

 rious forms. California, unfortunately, harbors all of the above- 

 mentioned species except, so far as we laiow, the tobacco tlu'ips. 



Messrs. Hood, Shull, Franklin, and D. L. Crawford have published 

 extensively on these insects since the monogra})h by Dr. W. E. Hinds 

 appeared. The writer also knows of others who are collecting thrips 

 and preparing manuscript on description of new species. It seems 

 opportune, therefore, for the sake of future workers, that a uniform 

 method of describing species be adopted. The writer, therefore, 



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