Bruner: South American Acridoidea. 29 



the section of the genus to which the present specie's belongs. Outer 

 row of spine- on hind tibiae thirteen in number. Mesosternal lobes 

 separated bj a slightly elongate space, which is deeply cleft at middle 

 l>v a verj profound longitudinal groove or sulcus, as in one or two 

 other species of the genus. 



General color pale chocolate-brown, varied on the femora and 

 abdomen by testaceo-ferruginous. In the female there is a very marked 

 subcostal dirty white line bordered above by one of dark brown; 

 remainder <>( tegmina wood-brown and dimly and irregularly con- 

 spersed with fuscous flecks. Genicular area of hind femora and 

 immediate base of hind tibiae strongly infuscated as in this sex of 

 robusta, austral is, and miliar. 



Length of body, d, 24.5 mm., 9, 36 mm.; of pronotum, d, 4.35 

 mm., ? , 7 mm.; of tegmina, d, ^i mm., 9 , 30 mm.; of hind femora, 

 d , 15.5 mm., 9 , -?,; mm. 



Habitat. — Corumba, Brazil, the d in March, the 9 in April. 

 Collected b\ II. II. Smith. Types (d and 9 ) in Carnegie Museum. 



35. Amblytropidia robusta Bruner. 

 Amblytropidia robusta Bruner, Proc. U. S. Nat. Mas., XXX, pp. 631, 632 (1906). 

 Habitat. — Sapucay, Paraguay. Also at hand from Puerto Bertoni, 

 Paraguay, but not among the H. H. Smith material from Chapada 

 and other localities in southern Brazil. 



36. Amblytropidia chapadensis Rehn. 



Amblytropidia chapadensis Rehn, Proc. U. S. Nat. Mus., XXX, p. 371 (1906). 



Habitat. — Corumba and Chapada, Brazil, September to November 

 (H. H. Smith). 



A similar, but somewhat slenderer species than the preceding. 



37. Amblytropidia interior sp. no v. 



Aboiii the -.ime size and having the general appearance of the 

 North American species, A. occidentalis Saussure, but differing from 

 that insect in its somewhat more robust form and by having fifteen 

 instead of fourteen spines on the outer edge of the hind tibiae. An- 

 terior and posterior lobes of the pronotum about equal in length. 



Vertex between the eyes at its narrowest point a little less than the 

 width of the fastigium at its widest part just in advance of their 

 upper anterior margin, the median carina rather broad and prominent 



