A MANUAL OF DAiNGEROUS LNSECTS LIKELY TO BE INTRO- 

 DUCED IN THE UNITED STATES THROUGH IMPORTATIONS. 



This publication has ])een prepared in the Bureau of Entomology 

 at the request of and in cooperation with the Federal Horticultural 

 Board to supply such information as is required by its officers 

 and others in the enforcement of c|uarantines and 'the safe- 

 guarding of this country against foreign insect pests. It should 

 assist materially in preventing the introduction of additional pests 

 like the gipsy moth, boll weevil, and alfalfa weevil. Only a brief 

 sketch can be given of each of the more important species. The 

 plants making up the commerce in vegetable products are arranged 

 alphabetically by the American common name, with the scientific 

 name following. It is believed that this arrangement is most con- 

 venient for inspectors. A brief sketch of certain important facts 

 concerning each plant is also given. 



The arrangement under each plant of the insects in two or more 

 categories, A, B, etc., is merely one of convenience. Under A are 

 grouped the better known insects, or those concerning which there 

 is available literature. This category especially contains pests 

 which are easily imported. Under B are listed many important 

 pests, possibly sometimes more' important than those listed in A and 

 often just as readily introduced. They are merely listed because 

 full descriptive matter was not available and for other similar reasons. 

 In later editions probably many of these pests will merit fuller 

 discussion. 



It is not to be expected that inspectors will attempt to make final 

 determinations with the aid of this work. In fact, it would be very 

 unwise to do so. The book is merely to indicate to inspectors and 

 entomologists the insects likely to be found associated with impor- 

 tations. 



The references to foreign literature under the species give the best 



or most easily available source of additional information. Tables 



and keys to species could not possibly be included in a work of this 



kind. It is expected that the inspector, on finding important insects 



not already familiar to him, will immediately transmit specimens to 



the Bureau of Entomology at Washington, D. C, for reference to the 



proper authorities or to other competent specialists in the groups to 



which the insects belong. 



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