80 OKTHOPTEKA. 



6. Alarum campus marginalis : 



a. totus pellucens (nonnunquam inf uscatus) . — [2. texensis] ; [3. surinamd] ; 5. mysteca; 



7 . pellucida ; [8. minuta]; [9. inquinata] ; 10. tceniata; 11. translucida. 

 aa. ad venas costales plus minus coriaceus ; 



6. nonnunquam subcoriaceus. — 5. mysteca; 7. pellucida. 

 bb. distincte coriaceus. — 6. flavipennis ; [12. gracilis], 

 aaa. dubise. — [4. dimidiaticornis] ; [9. inquinata]. 



[l. Chorisoneura anomala, sp. n. (Tab. II. figg. 23, 24.) 



$ . Sat minuta, fusca, vertice rufescente. Pronotum fere rotundato-semiorbiculare, pellucido, disco fusco 

 marginem posticum anguste liberante. Elytra abdomen vix superantia, testacea, nebulosa, linea humerali 

 fusca. Alse fuscse campo appendicular! majore, in requiete inter campum anteriorem et posteriorem 

 reconditus. Vena ulnaris arcuata, haud ramosa. Pedes fusco-testacei. Segmenta abdominis subtus 

 pallide limbata. Lamina supra-analis rotundato-trigonalis. Ultimum segmentum ventrale majusculum 

 subincisum. 



Long. 6-6; elytr. 5-7, pronot. 1*8, latit. pronot. 2*5 millim. 



Hab. Peeu, Tarma (Mus. Genavense). 



A species characterized by its rather short elytra, and by the appendicular field of 

 the wings, which is folded downwards and hidden under the wing.] 



[2. Chorisoneura texensis, sp. n. 



cJ . Tota fulvo-ochracea ; statura paulo minore quam Ch. pellucidce, paulo majore quam Ch. mystecce. Pronoti 

 et elytrorum margines laterales vitrei. Elytrorum vena discoidalis 4-5-ramosa; ejus rami sat longi- 

 tudinalesj baud distincte pectinati. Alse flavicantes, venis flavis. Venae costales 5-6 apice clavataa, 

 partim basi furcataa. Area medio-discoidalis quam area medio-ulnaris duplo latior, venulis transversis 

 paucis, in dimidia parte apicali. Vena ulnaris apice baud ramosa. Campus appendicularis apice valde 

 prominulus obtuse semiorbicularis, basi obtusangulus. 

 Long. 9*5; elytr. 9, pronot. 2-25, latit. pronot. 3*2 millim. 



Hab. North America, New Mexico, Texas {Boll, Mus. Genavense).] 



[3. Chorisoneura surinama, Sauss. 



Chorisoneura surinama, Sauss. Eev. et Mag. de Zool. 1868, p. 100. 13 ; Miss. Scient. Mex., Orthopt. 

 p.93.5(<?). 



Hab. Guiana, Surinam.] 



[4. Chorisoneura dimidiaticornis, sp. n. 



2 . Pusco-castanea, fronte et vertice rufescentibus, basi |- fuscse apice -| albidae. Pronotum subellipticum, 

 bi-impressum, disco trapezino-fusco, marginibus lateralibus late, posteriore anguste pellucentibus ; boc 

 subarcuato ; humeris carinulatis. Elytra castanea, subcornea, elongata, angusta, venis vix perspicuis 

 margine later ali anguste pellucido. Alas infuscatae, venis costalibus 4+6 nodosis ; vena ulnari indivisa 

 campo appendicular! apice obtuse semiorbiculari, basi rectangulo ; vena axillari biramosa. Pedes pallide 

 testacei. Abdomen f uscum, luteo-m arginatum ; cerci fusco-testacei. 



Long. 6 ; elytr. 6'2, pronot. 1-8, latit. pronot. 2-6 millim. 



Hab. Peru, Tarma {Mus. Genavense). 



This species is extremely like Anaplecta azteca (antea, p. 24), but differs from it in 



