IV INTRODUCTION. 



der drei Naturreiche" places them under the head of "Division B, false or 

 wingless Orthoptera," they have also been classed with the Orthoptera until 

 a better place can be found for them. The Mallophaga or bird lice also 

 possess distinct jaws instead of a sucking tube, (Verrill,) and have small and 

 hook-like mandibles. Such being the case, they cannot be placed with the 

 true Pediculina which are decidedly haustellate, and are, therefore, also 

 placed provisionally in Division B, or Wingless Orthoptera of LEUNIS. 



The text to accompany these plates will consist of merely the latest 

 name, and some of the principal synonyms of the insects figured, with a 

 concise history of their habits as far as known; their food, habitat; the best 

 remedies used to destroy them if injurious, and the name of the donor, with 

 a very short description of the principal families, or genera, and in some 

 instances a brief notice of the principal difference, or any striking peculiarity, 

 which distinguishes closely allied species from each other, so as to call attention 

 to that particularly in the comparison or arrangement of specimens in a 

 cabinet. There will also be a full alphabetical list of the principal vegetable 

 and animal substances injured by any species at the end of the volume, for 

 the use of farmers who do not understand anything about Entomology, but 

 who can thus be enabled to identify -any particular insect by referring to the 

 plant on which it is generally found feeding. 



The thanks of the author are due to ME. S. I. SMITH, of Yale College, 

 New Haven, Connecticut; MR. CHAS. E. DODGE, of Washington, D. C.; MR. 

 C. V. BJLEY, of St. Louis, Mo. for specimens kindly given from their own 

 private collections, and from which the original drawings were prepared. 

 Especial acknowledgment is due to the KEY. CYRUS THOMAS, of Illinois, and 

 MR. PHILIP R. UHLER, of Baltimore, Md., not only for type specimens, but 

 also for their valuable aid in comparing them with others, and in determining 

 doubtful species. It may also be well to observe, that the original type 

 specimens have been carefully preserved in the Entomological cabinet of the 

 Museum of the Department of Agriculture in Washington, for future refer 

 ence by any Entomologist who may wish to work up or study the Orthopter- 

 ous insects of the United States and Canada. 



This small pioneer edition of fifty copies is intended for distribution to 

 Entomologists and Entomological Societies only. The plates have been 

 etched and the text written either after or before the hours of official duty ; 

 and it is also published at the expense of the author, and not by the Depart 

 ment of Agriculture. If it should be approved of, it is proposed to publish 

 yearly, or from time to time additional plates &c. of the same size and in 

 similar style of any new or rare Orthoptera which may be added to our list by 

 the exploring expeditions, or by private enterprise, as likewise eventually to 

 illustrate all the other orders of insects in a similar manner. 



