IXT"KOOr(TIO\. 



It is not the design of the author in the following work, to present 

 scientific or highly-finished engravings of North American Orthoptera, but 

 merely figures, giving a general idea of their form, .size, and color, to aid the 

 young Entomologist in the identification of species. At the same time refer- 

 ence is made to their names in Me. Samuel H. Sctjdder's "Catalogue of 

 Orthoptera of North America," published by the Smithsonian Institution, 

 Washington, 1868, and to his "Materials for a Monograph of the North 

 American Orthoptera," published in "Proceedings Boston Society Natural 

 History, 1862," where many original descriptions as well as the names of 

 their authors may be found. The Rev. Cyrus Thomas has described many 

 new species in the "Proceedings of the Academy of Natural Sciences," 

 Philadelphia, 1870, and in the "Geological Surveys of Territories, made by 

 Dr. F. V. Hayden," 1870 and 1871. 



In some cases it has been found necessary to figure European insects. 

 where no specimens of the allied genera or species could be procured in the: 

 United States. In all such instances, the figures will 1"? marked as European, 

 and due credit given to the original work from which they wore taken. 



In the arrangement of the list accompanying each plate, the first name 

 given is always that of the latest and best authority ; and the last, the name of 

 the genus in which it was formerly placed by its first discoverer. As the works 

 of Say and Harris are most widely disseminated in the Northern and East- 

 ern states, then- names will also be given as synonyms when deemed necessary. 



Some of the insects figured have been transferred from other orders 

 to the Orthoptera, for the reasons given below, namely: — The Thripidce 

 were' formerly placed by Wesxwood by themselves in Tlujsanoptera, and 

 more lately by Dr. Packard among the HemA/ptera: but asWESTWOOD distinct- 

 ly says that " as they possess two setiform mandibles, and the disposition of 

 the other parts of the mouth are those of a real mandibulatcd insect," they 

 cannot properly be retained amongsl the haustellate Hemiptera, and are 

 therefore placed provisionally amongst the Orthoptera. Podura and its 

 allies also possess small mandibles with minute teeth, and are not mentioned 

 by Mn. Scudder in his list of Orthoptera; but as Lexjnis in his "Synopsis 



