Bruner: South American Acridoidea. 91 



[31. Homalosaparus sordidatus Rehn. 

 Homalosaparus sordidatus Rehn, Proc. U. S. Nat. Mus., XXXVI, pp. 155-157, 



figs. 36. 37 (1909)- 



Habitat. — Corumba and Chapada, near Cuyaba, Matto Grosso, 

 Brazil, Ma\ to August, main specimens of both sexes (H. H. Smith). 



Genus Bucephalacris Giglio-Tos. 

 Bucephalacris Giglio-Tos, Boll. Mus. Zool. Anat. Torino, IX, no. 184, p. 30 (1894). 

 The insects, which comprise the present genus, thus far have been 

 found over only a comparatively limited area in Bolivia, northern 

 Argentina, Paraguay, and Brazil. Two species have been described 

 heretofore, and now two others are added, although one of these latter 

 is far from being typical of the genus. All of the species, except the 

 type, arc based on single individuals. Judging from the structure of 

 the hind tarsi and what is known of the habits of related forms, it is 

 surmised that these locusts are arboreal in habit and possibly also 

 rather rare. It would be interesting to know something more con- 

 cerning the structure of the male genitalia, as well as the comparative 

 size of the sexes, in the different species. They may be separated 

 as follow s: 



Synopsis of the Species of Bucephalacris. 



A. Form rather graceful, cylindrical, or subcylindrical. Tegmina and wings a 



little shorter than the abdomen; the former with comparatively few 



veins. Hind tibiae glaucous. 



b. General color olivaceous, the tegmina tinged with rose or vinaceous. Size 



smaller (9, 23-25 mm.). 



c. Head large and decidedly wider than the front edge of the pronotum. 



borellii Giglio-Tos. 

 cc. Head smaller, but little wider than the front edge of the pronotum. 



fuscipennis sp. now 

 bb. General color dull grayish brown, the tegmina not tinted with rose or 

 vinaceous. Size larger ( 9 , 30 mm.). Hind femora provided with three 

 fuscous bands, inner face and lower sulcus blood-red. 



paraguayensis Bruner. 



A A. Form rather robust. Tegmina and wings considerably shorter than the 



abdomen; the former rather closely veined. Hind tibiae coral-red. 



I'pper lateral edges of pronotum dusky-banded corallipes sp. nov. 



132. Bucephalacris fuscipennis sp. nov. 

 General form slender, subcylindrical, reminding a little of the repre- 

 sentatives of the genus Coscineuta, but certainly nearer to Bucepha- 



