Bruner ; South American Locusts. 409 



Habitat, — There are two male specimens al hand, which wen- ■ 

 ai Santa Cruz de la Sierra, Bolivia, by J. Steinbach. 

 The type is deposited in the Carnegie Museum. 



Genus Chromacris Walker. 

 Chromacris Walker, Cat. Derm. Salt. Brit. Mus., IV, p. 643 (1870). 



75. Chromacris miles (Drury). 

 GryUus (Locusta) miles Drury, Illustr. Exot. Ent., II, p. 79, pi. 42, fig. 2 (1773). 



Habitat. — There are five specimens of this locust among the material 

 now under consideration, three males and two females. They were 

 taken in the U. S. of Colombia; Provincia del Sara and Santa Cruz de 

 la Sierra, Bolivia; and also at Galhua, Rio Sapao, western Bahia, 

 Brazil. 



The specimen from the last named locality, a female, is unusually 

 small. 



70. Chromacris stolli (Pictet et Saussure). 



Rhomalea slolli Pictet et Sausscre. Mitth. Schweiz. Ent. Ges., VII, p. 348 (1887). 

 Chromacris stolli Brcner, Proc. U. S Xat. Mus., XXX, p. 651, pi. 38, fig. 2 (1906). 



Habitat. — The collection contains a male from Sapucay, Paraguay. 



Genus Xestotrachelus gen. nov. 



The present genus, which is a member of the Chromacris group, is 

 represented by at least two well defined species, the representatives 

 of which are found in central and southwestern Brazil. They are 

 A", hasemani, described herewith, and Zoniopoda robusta Bruner (Ann. 

 Carnegie Mus., VIII, pp. 58, 60-62, Dec, 1911). The former may 

 be considered as the type of the genus. 



Composed of robust and brightly or strikingly colored insects a 

 trifle above medium in size. With some of the general appearances 

 of the representatives of both Tccniopoda and Chromacris. but with 

 the thoracic structure and color-pattern of the latter. Head smooth, 

 large, high or deep, and rounded above, and on sides back of the 

 eyes. Latter comparatively small and not prominent, considerably 

 longer than wide, but shorter than the anterior margin of the cheeks 

 below them, separated at the vertex by a space fully equal to, or even 

 greater than, the shortest diameter of the eyes; fastigium depressed, 

 and with blunt convergent antero-lateral carina', which continue as 

 the bounding walls of the frontal costa. the sulcation forming a rather 



