Bruner : South American Acridoidea. 23 



sometimes in verj dark specimens almost black, varied with dashes 



of testaceous. Sides of abdomen and pleura pallid, the underside 

 largely black. Wines clouded or smoky, save on the fenestrate area, 

 where they are transparent and vitreous. 



Length of body, cf , 20 mm., 9 , 24 mm.; of pronotum, d", 3.5 mm., 

 9, 4.1 mm.; of tegmina, cf, 19 mm., 9, 23.5 mm.; width of male 

 tegmina, 4.6 mm.; length of hind femora, d 71 , 12 mm., 9 , i.S mm. 



Habitat. — Chapada, Brazil, June to August (II. II. Smith,). 



Genus Toxopterus Bolivar. 

 Toxopterus Bolivar (nee Koch), An. Soc. Espafi, XIX, p. 313 (1890). 



27. Toxopterus miniatus Bolivar. 

 Toxopterus miniatus Bolivar, Anales Sue. Espafi. Hist. Nat., XIX, p. 314 (1890). 



Habitat. — Specimens of both sexes of this truxaline locust with 

 beautifully deeply red-colored wings are at hand. They were collected 

 throughout the season from January to December. The majority of 

 the specimens bear the label "Chapada," although there is a single 

 male labeled " Rio de Janeiro, November." 



Other specimens, which were collected in Bolivia, Paraguay, and 

 extreme northern Argentina, have been examined. 



Leurocerus gen. nov. 



The present genus is erected to receive the insect described by J. A. 

 G. Rehn as Cocytotettix linearis (Proc. U. S. Nat. Mus., XXX, p. 374, 

 1906). 



Elongate, slender, wings of male without the fenestrate area so char- 

 acteristic of the various species of Cocytotettix Rehn {Fenestra Brunner 

 v. Wattenwyl, but not of Giglio-Tos). Head about as long as the 

 pronotum. Antenna? gently ensiform in both sexes, of medium length. 

 Eyes pyriform, nearly twice the length of the anterior edge of the 

 cheeks; vertex almost as wide as the broadest part of the fastigium, 

 which is formed much as in Amblytropidia and provided with lateral 

 walls and a well-developed median carina. Front rather strongly 

 oblique; the frontal costa moderately prominent, silicate, or with the 

 disk merely depressed below the lateral walls, frequently provided 

 with a well-defined median ridge or carina above the ocellus. Pro- 

 notum with the sides nearly parallel, the lateral carinae nearly as 

 prominent as the median; the lateral lobes almost as high as long, the 



