280 OETHOPTEEA. 



obsoletis locati, a marginibus rostri leviter remoti; anterior in foveola rostri ante apicem exsertus. 

 Scutellum faciale superne obtusangulum, per carinulam compressam cum vertice conjunctum. Ultimus 

 articnlus palporum infundibuliformis. Antennae luteae, remote minute fusco-annulatae, primo articulo 

 subtus utrinque vitta fusca. Pronoti margines superi fusco-punctati ; canthi acuti, subsinuati, fusci. 

 Lobi laterales margine infero subrecto, horizontali. Elytra femora superantia, pallida, illis speciei 

 laudatse similiter venosa; venae transversa* tamen regulares, cum ramo interno angulataB; hoc, recto, 

 Tense diagonali subparallelo. Speculum angustum, quam latum plusquam sesquilongius, antice leviter 

 truncatum ; vena dividente subtili, incompleta, margine anteriore proxima. Area discoidalis et speculi 

 plica? longitudinales minus numerosas quam in 0. corrugato. Venae humeralis et mediastina nigra ; baec 

 3-9-ramosa, ramis primis arcuatis. Pedes illis speciei laudatae similes. Femora 1, 2 latiuscula. Lobi 

 geniculares rotundati; illi femorum posteriorum in proeessum brevem producti. Tibiae anticae intus 

 tympano elliptico, majore, extus minore, obsolete Tibiae posticae spinis 8 : 6. Metatarsus supra dentibus 

 minutis 1 : 2 armatus. 

 Long. corp. 11*7 ; pronot. 1*8, latit. 2-6 ; elytr. 13-3, latit. supra 3-8 ; femor. post. 10 millim. 



Hab. Panama, Bugaba {Champion). 



A very distinct species, characterized by its small size and pale colour. 



ECTOTKYPUS, Sauss. 



Ectotrypa, Saussure, Miss. Scient. Mex., Orthopt. p. 466 (1870). 

 Ectotrypus, Saussure, Melang. Orthopt. 6 e fasc. pp. 647, 757. 



Form slender, elongate ; the head nearly horizontal. Males unknown. 



I. Ectotrypus Olmecus, Sauss. 



Ectotrypa olmeca, Sauss. Miss. Scient. Mex., Orthopt. p. 467. 1 ( ? ) . 

 Ectotrypus olmecus, Sauss. Melang. Orthopt. 6 e fasc. p. 757, fig. lx. ( ? ). 



5 . Gracilis, fulvo-flavus ; vertice anterius pronotoque brunneis. 



Hab. Mexico (Saussure). 



II. Genera in which the males are similar to the females, their elytra not being 



transformed into a musical instrument. 



EUSCIRTUS, Guerin. 

 Euscyrtus, Guerin-Meneville, Icon, du Regne Anim., Ins. p. 334 (1829-1838). 

 Euscirtus, Saussure, Miss. Scient. Mex., Orthopt. pp. 466, 500; Melang. Orthopt. 6 e fasc. 

 pp. 648, 762. 



l. Euscirtus mexicanus, Sauss. 



Euscirtus mexicanus, Sauss. Miss. Scient. Mex., Orthopt. p. 501. 1 ( ? ), t. 7. fig. 14; Melang. 

 Orthopt. 6 e fasc. p. 768 ( ? ). 



Hab. Mexico, Orizaba (Saussure). 



APHONUS, Sauss. 

 Aphonus, Saussure, Miss, Scient. Mex., Orthopt. pp. 466, 509 ; Melang. Orthopt. 6 e fasc. pp. 648, 796. 

 The American species of this genus have the last joint of the maxillary palpi dilated, 



