L>t; Annals of the Carnegie Museum. 



d. Anterior portion of the disk of pronotum narrower than the hind 



portion; lateral carinse of male pronotum concolorous, disk 



and sides not decirJedly infuscated. [Mexico. 1 



myslcca Saussure. 



dd. Anterior portion of the disk of pronotum about equal to the width of 



the hind portion, the disk and sides more or less strongly 



infuscated. 



e. Sides of basal abdominal segments strongly marked with black. 



[Mexico.] ingenita Bruner. 



ee. Sides of basal abdominal segments not infuscated or black. 



[Southern Brazil.] interior sp. nov. 



bb. Hind tibiae provided with but fourteen spines on outer row. [Eastern U. S. 



.. , , c occidentalis Saussure. 



southward.] J 



( subconspersus Walker. 



29. Amblytropidia ferruginosa Stal. 



Amblytropidia ferruginosa Stal, Recens. Orthopt., I, p. 107 (1873). 



Habitat. — Four males and one female taken at Chapada, Brazil, 

 during the months of March, May, and November (H. H. Smith). 



These specimens on account of their markedly ferruginous color 

 and agreement in size with Stal's measurements warrant me in placing 

 them under ferruginosa. They are quite distinct from all other forms, 

 which have been examined by me. 



30. Amblytropidia australis Bruner. 



Amblytropidia ferruginosa Giglio-Tos (nee Stal), Boll. Mus. Zool. Anat. Torino, 

 IX, No. 184, p. 13 (1894); Bruner, Locusts of Argentina, p. 32 (1900). 



Amblytropidia australis Bruner, Biol. Cent. Amer., Orthopt., II, pp. 62, 64 

 (1904). 



Habitat. — Paraguay and Argentina. Not contained among the 

 material collected by H. H. Smith and now being studied. Neverthe- 

 less there is little doubt as to its occurrence in southern Brazil. 



31. Amblytropidia geniculata sp. nov. 



Very similar to A. australis Bruner, but slightly larger, somewhat 

 more graceful, and with longer tegmina and wings. As indicated in 

 the synoptical table, there are faint fuscous dots present on the dorsal 

 area of the folded tegmina. The apex of hind femora and base of 

 tibia? are strongly infuscated. 



Length of body, o 71 , 21-23 mm., of pronotum, 3.45 mm., of tegmina, 

 17-18 mm., of hind femora, 13-13.5 mm. 



Habitat.— Corumba, highlands, March to July (H. H. Smith). 



