166 PROCEEDINGS OF THE ACADEMY OF [April, 



The variation in size exliibited by this series, in addition to the sUght 

 variation in the comparative length of the rostrum, would at first sight 

 appear to be due to the presence of two or more species. However, no 

 line of demarcation in size or in the number of tibial spines, the latter 

 extremely variable in individuals, can be recognized, and for the 

 present at least all are considered costulata. The strength of the 

 abdominal strigte is another character of variability in this material, 

 and two of the female specimens appear to be what Bruner has pro- 

 visionally called hurmeisteri.^ 



ACRIDIN.E. 



The material belonging to this subfamily has been studied in two 

 previous papers,^*^ the species being merely listed here, with any com- 

 ments brought out by an examination of determinations in Prof. 

 Bruner' s later paper {vide antea). 



HYALOPTERYX Charpentier. 

 Hyalopteryx rufipennis Charpentier. 



Bruner has described as H. spccularis ^^ the form referred by the 

 author to Charpentier's species. 



EUTRYXALIS Bruner. 

 *Eutryxali3 gracilis (Giglio-Tos). 



TRUXALIS Fabricius. 

 Truxalis brevicomis (Limueus). 



ORPHULA Stai. 

 Orphula pagana (Stai). 



AMBLYTROPIDIA S»al. 

 Amblytropidia robusta Bruner. 



The specimens referred with some little doubt to A. ferruginosa Stal 

 by the author belong to Bruner's recently described species. 



*Amblytropidia cbapadensis Rehn. 



ORPHULINA Giglio-Tos. 

 Orphulina pulcbella Giglio-Tos. 



» Proc. U. S. Nat. Mus., XXX, p. 619. 



'" Notes on South American Grasshoppers of the Subfamily Acridinte (Acrididae), 

 with Descriptions of New Genera and Species. Proc. U. S. Nat. Mus., XXX, pp. 

 371-391. May, 1906. Studies in South and Central American Acridinae (Orth- 

 optera), with the Descriptions of a New Genus and Six New Species. Proc. Acad. 

 Nat. Sci. Phila., 1906, pp. 10-50. May 19, 1900. 



^' Bruner's H. lameUipes from Sao Paulo, Brazil, in all probability equals H. 

 aainus Rehn. 



