Bruner: Tropical American Tettigonoidea. 399 



Synopsis of the South American Genera of Gryllacrid.^. 



A. Species winged. 



b. Subgenital plate of the male provided with articulated or movable styles. 



Gryllacris Serville. 



hb. Subgenital plate of the males not provided with jointed or movable styles. 



c. Posterior tibiae provided above with two large spines internally and 



five spines externally Dibelona Brunner. 



cc. Posterior tibiae above provided on both margins with seven equal 



spines Hyperbanus Brunner. 



A A. Species apterous or subapterous. 



b. Tegmina, when present, lobiform Neanias Brunner. 



bb. Tegmina absent. Anterior and middle tibiae below sometimes furnished 

 with four spines on the apical third Neortus Brunner. 



Genus Gryllacris Serville. 



Gryllacris Serville, Ann. Sci. Nat., XXII, p. 138 (1831); lb.. Hist. Nat. Ins. Orth., 

 p. 392 (1839); Burmeister, Handb. Ent., II, p. 717 (1838); Brunner, Verh. 

 Zool.-Bot. Ges. Wien, XXXVIII. pp. 316. 317 (1888); Sauss. & Pict., Biol. 

 Centr.-Amer., Orth., I, p. 285 (1897); and others. 



Larnaca Walker, Cat. Derm. Salt. B. M., I, p. 190 (1869). 



The genus Gryllacris is distributed throughout the tropics. It is 

 represented by over two hundred known species and others are being 

 added at short intervals from time to time as collections from various 

 new regions are studied. The representatives of the genus, as men- 

 tioned in the introductory remarks for the family, are all nocturnal 

 in their movements. While some of the species have abbreviated 

 tegmina and wings, I believe that none are entirely apterous, as is 

 the case with some representatives of the other genera of the family. 



The genus Gryllacris is without doubt one of the oldest of the Orthop- 

 teroid insects. This we assume from the fact of its wide distribution, 

 continental, and insular. . While the center of distribution seems to be 

 Oceanica and the adjoining portions of Asia, there are many repre- 

 sentatives also in both Africa and tropical America. Nine years ago 

 there were at least a dozen species known from tropical American 

 countries. Since then fully that many more have been added. 



The material now being reported upon contains several specimens. 



163. Gryllacris laevigata Brunner? 

 Gryllacris lavigata Brunner, Verh. Zool.-bot. Ges. Wien, XXXVIII, p. 344 (1888); 



KiRBY, Syn. Cat. Orth., II, p. 143 (1906). 



Habitat. — A single female specimen of a Gryllacris coming from Rio 

 de Janeiro, Brazil, is referred here with some doubt. It was taken by 

 H. H. Smith during the month of November. 



