36 Annals ok the Carnegie Museum. 



4<x. Scyllina smithi Rehn. 

 Scyllina smithi Rehn, Proc. U. S. Nat. Mus., XXX, pp. 387-388 (1906). 



Habitat. — Chapada, near Cuyaba, Matto Grosso, Brazil; also Rio 

 de Janeiro (H. H. Smith). They were taken during the period em- 

 braced by the months of April to October inclusive. 



49. Scyllina schistocercoides Rehn. 



Scyllina schistocercoides Rehn, Proc. U. S. Nat. Mus., XXX, pp. 388-390 (1906). 

 Habitat. May to October at Corumba and Chapada, Brazil (H. H. 

 Smith). 



Several other species of the genus undoubtedly occur in the same 

 general region. They are S. brasiliensis, conspersa, varipes Bruner, 

 and S. borellii Giglio-Tos. 



Genus Stereotettix Rehn. 

 Stereotettix Rehn, Proc. U. S. Nat. Mus., XXX, p. 381 (1906). 



50. Stereotettix paralogistes Rehn. 



Stereotettix paralogistes Rehn, Proc. U. S. Nat. Mus., XXX. p. 381 (1906). 



The collection contains a large series of a small grasshopper, which 

 I refer to this species. Both sexes are represented. Aside from con- 

 siderable variation in color and some in size, there are two distinct 

 types of pronotal structure as regards the lateral carinae. In the 

 typical form these are complete, straight, and nearly parallel. In the 

 other form they are interrupted and rather strongly arcuate, as in 

 Stiropleura. A few specimens are at hand, in which these carinae are 

 present only as short anterior and posterior extremities of what might 

 have been decussate lines 00. Since there are no apparent other 

 differences in the two forms, and intermediate forms exist, not even 

 varietal names need be suggested. Only in those individuals having 

 these carinae interrupted to a greater or lesser degree is there a notice- 

 able tendency towards arcuation. 



Habitat. — Chapada, near Cuyaba, Matto Grosso, Brazil, March to 

 October (H. H. Smith). 



In some of the individuals there is also a tendency towards wing 

 abbreviation, in which case the tips of these members do not reach 

 the apex of the abdomen. This feature is usually, but not always, 

 most apparent among the females. 



