208 PROCEEDINGS OF THE ACADEMY OF [May, 



These specimens all represent the long and narrow headed type 

 of the didactylns-camerani group. We have no Brazilian material 

 of this species in the collections before us other than those listed 

 above, and it seems quite probable that some of the older records 

 of this species, particularly those of its occurrence at points far 

 removed from the Guianan region, may relate to camerani or other 

 species. We have material and records showing the occurrence of 

 camerani over the upper and middle Amazonian regions. 



The present series shows great size variation, the extremes in the 



Igarape-assu series being very great. 



Ripipteryx circumcincta Saussure. 



1874. Rhipipteryx circumcincta Saussure, Miss. Scient. Mexiq., Rech. Zool., 

 VI, p. 358. [South America.] 



Para. (C. F. Baker.) One female. 



Igarape-assu. December, 1911 and January 17, 1912 (two speci- 

 mens with dates). Four males, thirteen females. 



This series is quite uniform in coloration and size. The only 

 exact records we have for the occurrence of this species are those 

 of Bruner of material from Benevides and Para, State of Para, 

 Brazil. 



Gryllinae. 

 Hygronemobius albipalpus (Saussure). 



1877. N[emobius] albipalpus Saussure, Melang. Orthopt., II, fasc. V, p. 257. 

 [Rio de Janeiro, Brazil.] 



Igarape-assu. January 17 to 23, 1912. Seven males, fourteen 

 females. 



These specimens have been recorded by Hebard in his study of 

 the genus.^^ 



Nemobius brasiliensis (Walker).^^ 



1869. Argizala brasiliensis Walker, Catal. Dermapt. Salt. Brit. Mus., I, p. 

 61. [Brazil; Santarem, Brazil.] 



Igarape-assu. One male. 



This widely distributed and striking species has been recorded 



from as far south as Paraguay and north to Mexico. 



Hemigryllus ortonii (Scudder). 



1869. Nemobius ortonii Scudder, Proc. Boston Soc. Nat. Hist., XII, p. 330. 

 [Napo or Maranon (Rivers).] 



Para. (C. F. Baker.) One female. 



« Entom. News, XXVI, p. 198. 



^= We find that Bruner's Nemobius argentinus, recently described from Car- 

 carana, Argentina (Ann. Carneg. Mus., X, p. 371, (1916)) is identical with the 

 present author's Ne7nobius hebardi, from Buenos Aires and the Misiones, Argen- 

 tina, described over a year previous (Proc. Acad. Nat. Sci. Phila., 1915, p. 290, 

 figs. 4 and 5. (1915)). 



