482 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



species of that genus will have to be more carefully studied, which will 

 require a comparison of a large number of specimens. 



In giving the ijames of species in my Synopsis, I adoi3ted the plan 

 which appears to prevail in this country of attaching the name of the 

 author of the combination (generic and specific) used. I am convinced 

 that -this is objectionable, and that the name of the original describer of 

 the species should be given, and hence have followed this method in 

 this paper, and propose so doing hereafter. 



As will be seen, some reference is made to Stal's '•'■Becemio OriJiop- 

 terorum^'; but the changes in that work have not in all cases been adopted. 

 EespectfuUy yours, 



CYRUS THOMAS. 



Dr. Elliott Coues, U. S. A., 



Washington, I). C. 



ACRIDID^. 



1. Stenobothrus curtipfMnis Harr. 



The specimens in the collection belong to the long-winged vari^tfy 

 [St. longipennis Scudd.). 



Stal restores the name GoonpJiocerus of Thunberg, and in his " Con- 

 spectus Geuerum" makes it equivalent to Stetheopliyma Fisch., Arcyptera 

 Serv., Chrysochraon Fisch., and GompJiocerus Thunb., yet in the body of 

 his work he gives Stetheophyma Fisch. as a distinct genus. In a former 

 paper, ''Freg. Eug. Eesa. Ins. Orth. 1860", he seemed disposed to in- 

 clude in this genus the greater portion of the Tryxaloid (Edipodce. For 

 example, we find him including under this, as subgenera or otherwise, 

 the following genera of his present work : — Sinipta, part of TryxaUs, 

 PMceoha, Pnorissa, Goynp liocer us Thxxnb., Epacromia Fisch., ScylUna. Of 

 course, the subgenera then named foreshadowed his intention to sub- 

 divide the genus, yet his use of the latter shows that he was following 

 too closely Thunberg, notwithstanding the great advance made by 

 Charpentier, Burmeister, Serville, Fischer, and others. It is true the 

 characters of Stenobothrus as given by Fischer fail to include all the 

 species which evidently belong to the group. But the difference between 

 the Stethcophymw and typical Stenobothri of Fischer, it appears to me, is 

 too clear in its character to associate them in one restricted genus when 

 other genera have been separated from the group on such slight char- 

 acters. 



2. Tomonotus tenebrosus Scudd. 



Specimens of the typical form and that I described a,s pseudonietmms 

 are in the collection j the latter, as a general rule, is smaller than the 

 former, and is very distinctly marked with the pale stripes along the 

 sides of the pronotum. The locality at which these specimens were 

 obtained forms, so far as known, the northern limit of the range of this 

 species, which extends south to Kew Mexico, east to Illinois and Saint 

 Paul, Minn., and west a short distance beyond the range of the Rocky 



