246 E. p. VAN DUZEE. 



ous Agricultural Experiment Stations throughout the country. The 

 object has been to assist the beginner in naming his material and 

 determining the geographical distribution and systematic position of 

 the genera and species he may meet with. As so many of our 

 southern forms have been described from material obtained from 

 stations beyond the limits of the United States, all species recorded 

 from Mexico and the West Indies have been included. 



The accompanying bibliography embraces all books and papers 

 referred to in the catalogue and will serve as an index to its com- 

 pleteness. The list of localities affixed to each species is, in most 

 instances, very incomplete, and shows how little is now known of 

 their geographical distribution. The index includes genera and 

 synonyms only. All names in italics, whether of genera or species, 

 must be looked for in the catalogue among the synonyms. Any 

 North American species that does not appear in the catalogue in the 

 genus under which it was described, should be found under that 

 generic name in the index. 



The nomenclature of the Typhlocybina is little more than a copy 

 of Mr. C. W. Woodworth's work on this subfamily published in 

 vol. V of " Psyche,'' pp. 211-214. In the Jassidse and Bythoscopidse 

 the author has studied nearly all the species and assumes much of 

 the responsibility for the synonymy adopted. While in the Tetti- 

 gonid^ the labors of Stal, Signoret and Spangberg have furnished 

 the authority for most of the references. 



The following summary will afford an idea of the proportion in 

 which the several families are represented in our fauna : 



genera. species. 



ULOPID.E 1 1 



LEDRID.E 1 i 



BYTHOSCOPID^ 7 47 



TETTIGONTD.E 20 176 



JASSID^ '^9 187 



Total 58 412 



