A PRELIMINARY CLASSIFICATION OF THE TRYXALINAE OF 

 THE UNITED STATES AND CANADA. 



BY SAMUEL H. SCL'DDER, CAMBRIDGE, MASS. 



The Try.xalinae of this country were 

 first made known in tolerable complete- 

 ness and systematic shape by McNeill 

 in an important paper published a little 

 more than a year ago. His table for the 

 separation and sequence of the genera 

 was, with slight changes (mainly to ad- 

 mit a few types which were rejected by 

 him and to omit one belonging else- 

 where) copied by me in my recent Guide 

 to North American Orthoptera, because 

 this latter work was published immedi- 

 ately after the issue of McNeill's Re- 

 vision ; was in fact awaiting its issue. 

 But I there expressed the opinion that 

 the order and alliance of the genera, 

 especially with the changes I had intro- 

 duced, left much to be desired, and I 

 therefore prepared the subjoined table, 

 which seems to me to place the genera 

 in better order and indicates at the same 

 time some of the larger groups. This 

 arrangement is also in better harmony 

 with the general outline of the classifi- 

 cation of the Tryxalinae of the world 

 given by Brunner von Wattenwyl in his 

 SystSme in 1893, which was too little 

 regarded by McNeill. Some of the new 

 genera indicated by Brunner at that 



time and unrecognized by McNeill are 

 here included. 



The table has been subjected to some 

 use and found to answer tolerably well, 

 though I am not entirely satisfied with 

 it and therefore publish it only as a pre- 

 liminary attempt, which I hope to im- 

 prove with time and criticism. It was 

 intended to be accompanied by the 

 addition of descriptions of a number of 

 new forms, but as this part must be 

 deferred under the pressure of other 

 demands, I shall hope to reissue the 

 table in a revised form when the des- 

 criptive portion is ready. Meanwhile, 

 in explanation of certain points, 1 add a 

 few notes referred to by number in the 

 table and given at the close. They re- 

 late principally to the new names here 

 introduced and to the synonymy of some 

 of the genera. Except to indicate the 

 types of the new genera, no reference 

 to species is made in this paper. 



It is well to remark that our Tryxaline 

 fauna is composed almost entirely of 

 endemic types, only three of its thirty- 

 seven genera being common to the Old 

 World and the New, and these three be- 

 ing boreal types. 



