Bruner: South American Acridoidea. 77 



.1 wide raised margin, then contracted to a little less than one half 

 its basal width, and projei ted between the cerci as a widely hollowed 

 finger .1- far as the length of the wide basal half. Cerci very broad 

 at base, suddenly contracted from above to about one-fourth the 

 width, directed backward, then suddenly upward and tapering, the 

 apex transverse, acuminate, piceous; the base of supra-anal plate 

 provided with four to six piceous tubercles. 



At firsl glance the representatives of this genus remind one of 

 Inusia, but the contiguous mesosternal lobes place it along with the 

 i referred to above in connection with the comparisons drawn 

 between genera. It does not come very close to Leptysma as will be 

 seen by a comparison of the size and form of the fastigium of the vertex. 

 The same may also be said on comparing it with Stamens. Its ensi- 

 form antenna 1 will readily separate it from the latter genus. 



no. Columbacris caudata sp. nov. 



Uniformly pale grass-green, without traces of paler and darker 

 lateral, longitudinal bands. Its general appearance is that of a 

 slender Aniilia (Stenacris^, but it is quite distinct from the various 

 representatives of that genus, as indicated by the elongate triangular 

 vertex, the very strongly oblique front, the decidedly ensiform antennae, 

 and the very pointed and slightly downwardly curved last ventral 

 segment of the male abdomen. 



Length of body, cf . 31 mm., of pronotum, 4.6 mm., of tegmina, 25 

 mm., of hind femora, 13. 5 mm., of antennae, 9.5 mm., or about as long 

 as the combined length of the head and pronotum. 



Habitat. — The type, a male, comes from Corumba, Brazil, where 

 it was taken during March by H. H. Smith. It is the property of 

 the Carnegie Museum. 



An additional specimen, also a male, without antennae and hind 

 is at hand. It comes from the same locality and bears a like 

 date This second specimen has a slightly slenderer fastigium of the 

 vertex than the type, but otherwise is practically the same. 



Genus Leptvsmina (dglio-Tos. 

 Leplysmina < iit.Lio-Tos, Boll. Mus. Zool. Anat. Torino, IX, no. 184, p. 34 (1894). 

 The present genus is composed of several medium-sized sub- 

 cylindrical locusts, which bear a rather striking resemblance to the 

 species of Leptysma. but which are readily separated from the repre- 

 sentatives of that genus by the four-grooved fastigium of the vertex. 



