OEOCHAKIS. 271 



g. Vertex antice planatus. Pronotum antice subcoarctatum.— 9. gryllodes, 

 Pall. — 10. saltator, Uhl. — 11. mexicanus, sp. n. 

 ffff. Caput superne globosum, rostro verticis valde obliquo, latiusculo. 

 Pronotum antice vix coarctatum. — [helvolus, Sss. (Guiana) .] 

 cc. Ovipositor valvis apicalibus obtusis, apice crenatis. ; 



d. Luteo-flavescens ; ocellis minimis. — [12. vaginalis, Sss.] 

 dd. Griseus ; ocellis mediocribus, vertice linea transversa, callosa, instructo. — [13. 

 terebrans, sp. n.] 



II. 



1. Caput * : 



a. supra globosum, vertice convexo ; rostro verticis brevi, lato. — maxillaris ; [conspersus ? 

 (Brazil)]. 

 aa. supra posterius convexum, antice depressum vel oblique planatum, rostro verticis distincte 

 producto. — Reliquce species. 



2. Ocelli: 



a. magni, opaco-albidi, invicem propinqui. — [saulcyi] ; ocellaris; gaumeri(?) ; rodriguezi; 

 maxillaris (?) ; [canotus] . 

 aa. minores vel minimi, vitrei, invicem remoti. 



b. majusculi. — gaumeri; maxillaris; [amusus] ; may a ; [fulvescens, Sss. (S. Amer.)] ; 

 [conspersus, Sss. (Brazil)]. 

 bb. minuti. — tibialis ; mexicanus ; saltator ; gryllodes ; \terebrans~\ ; [vaginalis'] ; [cayen- 

 nensis] ; [antillarum] ; \dominguensis~\ ; [helvolus'] . 



3. Ultimus articulus palporum maxillarium : 

 a. dilatatus, 



b. latius quam longus, valde securiformis. — maxillaris. 

 bb. trigonalis, supra vix sinuatus ; 



c. paulo longius quam latus. — [dominguensis] . 

 cc. angustus, infundibuliformis. — [cayennensis] ; [amusus], 

 aa. apice iufundibuliformis, basi gracilis, sublinearis. — gaumeri; ocellaris; tibialis; [terebrans]; 

 may a; [saulcyi] ; rodriguezi; [vaginalis]; gryllodes; saltator; [fulvescens]; mexicanus. 



4. In marium elytris pars stridulans vena analis : 



a. sensim transversa (campus analis propter hoc extus plus minus quadratus) ; 



b. transversa, vix arcuata; campus analis extus quadratus, angulo truncate. — gryllodes; 

 saltator ; [vaginalis] . 

 bb. arcuata, cum parte basali longitudinali venae analis angulum obtusum efficiens. — tibialis, 

 aa. obliqua, flexuosa, cum parte basali venee analis in arcum continua (campus analis propter 

 hoc magis elongatus, oblique subpiriformis, postice attenuatus) .— [conspersus]. 



* 0. helvolus, Sss., from Guiana (Miss. Scient. Mex., Orthopt. p. 495), can not be here identified, the type 

 not being available for examination. 



