IL11H.-Scpt. 1S94. I 



PS IT HE. 



103 



species, witli two additional forms ot 

 doubtful specific value, and about ten 

 toleialily distinct forms cliaracterized 

 bv unimportant variations in color and 

 structure; some of these last have been 

 and still are occasionally referred to as 

 species. Of this number two are new 

 species recently described and six have 

 not been reported in previous lists, 

 while several names occtu'ring in the 

 literature of the group have been 

 reduced to synonyms or retained in 

 places below specific rank. 



I have met in the field in various 

 parts of New England all but two 

 species, and one of these I have taken 

 in an adjoining state, while 1 have 

 examined representatives of all. Some 

 of them are the most abundant of 

 insects while others are extremely rare, 

 one species, Hesperotettix viridis 

 Thos., not having been reportetl, so 

 far as I am aware, from the territory 

 east of the Mississippi River until taken 

 by me at VVellesley. 



The list is based chiefly upon 

 material personally collected, but also 

 upon an examination of the types of the 

 species described bv Mr. Scudder — to 

 whom I am imder obligation in manv 

 ways — together with other material in 

 his collection, and upon the more 

 important literature on the group. To 

 Mr. Wm. Beutenmiiller I am indebted 

 for notes on those species occurring in 

 the vicinity of New York. 



A few of the principal synonyms and 

 names less exactly equivalent accom- 

 pany those of the species and genera in 

 the list and I have added in the index 



the generic and specific names used in 

 eight of the most important or gener- 

 ally accessible publications (see index) 

 on -the New England members of the 

 fmiil\', referring to the numbers borne 

 bv those groups in the list, thus making 

 it to a considerable degree synonymical 

 and bibliographical, a feature which 

 the novice and possibly others will 

 appreciate. .Such notes as it seemed 

 woukl render the list more convenient 

 to use are also added to it and references 

 to descriptions of certain species not 

 included in the literature cited, as well 

 as to the more useful of those contained 

 therein. 



A more extended work containing 

 diagnostic keys and notes on the habits 

 and distribution of the species is con- 

 templated. 



In numbering the species and forms 

 I have not attempted to indicate the 

 difference between subspecies, variety, 

 and dimorphic form, but have used a 

 somewhat elastic modification of the 

 decimal method which I trust will be 

 found clear, brief, and in consequence 

 convenient to use in designating these 

 forms in exchanges, e. g., and readily 

 capable of sufficient extension to allow 

 of all necessary additions likely to 

 occur. This method is as follows : — 

 each species is indicated by a numeral ; 

 each of its marked forms distinguished 

 by structural characters by a decimal 

 of this ; each form distinguished by 

 general coloration by a figure in the 

 hundredths place ; and in case of color 

 ditlerences pertaining to special parts 

 by a figure in the thousandths place. 



