GEYLLACEIS. 305 



being flat and somewhat coriaceous ; but as the elytra are curled up together at their 

 extremity, it is impossible for one of them to rub on the other. 



The Gryllacrinse, numerous in the Old World, include but few genera, and they do 

 not seem to be very abundant in Central America. 



GRYLLACRIS, Serv. 



Gryllacris, Serville, Eev. Method, des Orthopt. p. 394 (1831) ; Brunner v. Wattenwyl. Monogr. 

 der Stenopelm. und Gryllacr. p. 73*. 



Synopsis specierum. 



a. Eytra testacea vel hyalina : 



b. venulis transversis fuscis. Pedes toti vel partim nigri, geniculis testaceis. Femora postica 

 dimidia parte apicali atra. Tibiae anticse testaceae, atro-fasciatae. Pronotum atrum. — 

 1. alternans, Brunn. 

 bb. venis et venulis omnibus roseis. — 2. salvini, sp. n. 

 aa. Elytra testacea vel ferruginea, venis et venulis transversis concoloribus vel pallidioribus. Alae 

 totae hyalinae. Tibiae anticse et femora postica corpore concolores vel rufescentes. Tibiae 

 anticae et intermediae subtus spinis utrinque 4 vel 5 armatae. Ovipositor subrectus. 

 b. Elytra ampla, longa, quam femora postica duplo longiora. Frons pallida. Ovipositor 

 rectus, compressus, basi teres, quam femora paulo longior. — 3. longipennis, Pict. & Sss. 

 bb. Elytra obtusa, quam femora postica longiora. Frons tota nigra vel nigro-fasciata ; ocellis 

 flavis. Ovipositor compressus, subrectus, quam femora postica fere sesqui-longior. 

 (Tibiae posticae supra margine externo 5-7-, margine interno 4-5-spinuloso.) Vertex 

 infuscatus. 

 c. Genicula et tibiae concoloria. 



d. Pronotum unicolor vel vittis rufis diffusis ornatum. Spinulae femorum et tibiarum 

 posticorum tantum apice infuscatae. — 4. abluta, Brunn. 

 dd. Pronotum lineolis fuscis pictmn. Spinulae femorum et tibiarum posticarum totae 

 nigrse et basi atro-circumdatae. — 5. picta, Brunn. 

 cc. Tibiae basi nigrae. 



d. Ovipositor apice obtusus. — 6. cyclops, sp. n. 

 dd. Ovipositor apice acutus. — 7. maculata, Brunn. 



* In Brunner's synopsis of the species of the genus Gryllacris two errors occur in the text (p. 82) : — 



6, 6. (Species Americanae, <fec.) Instead of " femore postico duplo longior " read " sesqui-longior? or " vise 

 sesqui-longior" 



7. (Caput &c.) Instead of " femore postico sesqui-breviore " read " femore postico sesqui-longiore." 



These corrections must also be made in the descriptions of the species, as proved by the measurements given 

 by the author. 



biol. CEKTR.-AMEE., Orthopt., September 1897. 2 Br 



