864 ZOOLOGY INSECTS. 



I. Subfamily PEOSCOPIN^). 



I. Group Proscopini. 

 2. Group (Mastacini). 



II. Subfamily ACRIDIN^. 



Division 1. CONOCEI'HALIDES. 



3. Group Tryxalini. 



Division 2. OKTHOCERIDES. Division 3. XIPHOOERIDES. 



4. Group CEdipodini. G. Group Phymatini. 



5. Group Acridini. 7. Group Pamphagini. 



Division 4. ( ?.) 



8. Group Pncumorini. 



9. Group (Chorcetypini). 



10. Group (Ccelopternini). 



111. Subfamily TETTIGINAE. 



II. Group Tettigini. 



Those included in parentheses are introduced provisionally, as I am 

 unacquainted with the species forming them. So far as I am aware, only 

 the third, fourth, fifth, sixth, and eleventh groups are represented in the 

 North American fauna. 



In connection with the list of the species found in the collection under 

 examination, I will give short descriptions of the new North American 

 genera and species described by Stal, and also give the new positions of 

 some of the hitherto described species, under the foregoing modifications. 



Subfamily ACBIDINAE. 



TRYXALINI. 



I cannot, with my present knowledge of the genera, accept Stal's 

 removal of Mesops and Opomala from this group. It is probable that the 

 species I have placed in Mesops may have to be removed to other genera, 

 and the name retained for other species which belong elsewhere. I shall 

 also transfer to this group Oxycoryplms, Acrolophitus, Pedioscertetes, Chryso- 

 chraon, Stenobothms, and Gompliocerus (the two latter should probably be 

 united into one genus). 



