EHIPIPTERYX. 211 



apice compressi, dilatati ac truncati, latere interno cnncavo, foveolato ; simul sumpti forcipem efficientes (a). 



Lamina infra-genitalis convexa, apice compresso-carinata. 

 2 . Long. corp. 9-2, cum alis 9-2 millim. 

 c? . Long. corp. 8, cum alis 9-3 millim. 



Hab. Colombia, most likely extending to Panama and Central America. 



This species is very similar to R. carhonaria in colour, but differs from that insect 

 by its short form. It has the pronotum shorter, with the posterior process but little 

 produced, the hind margin less arcuate, the humeral emargination very obtuse, 

 although more distinct than in R. mexicana, and the lateral margins arcuated. The 

 cerci of the male forming a sort of forceps is very characteristic. 



Obs. — Rhipipteryx atra, Serville, Orth op teres, p. 318, and Guerin-Meneville, Icon. 

 Eegn. Anim., Ins. p. 338, a much smaller species (length 2 lines) from the same 

 region, is unknown to me.] 



2. Rhipipteryx carbonaria, sp . n. 



$ . Gracilis, elongata, tota atra, subglabra, corpore picturis nullis. Antennae articulis 3 ultimis sulfureis, 

 ultimo apice nigrescente. Caput laevigatum. Pronotum longiuseulum, processu postico longiore, margine 

 magis arcuato ; sinu humerali utrinque valde inciso, obtusangulo ; lobis lateralibus postice margine 

 infero recto. Elytra basin concharum femorum posticorum superantia. Alse longe caudatae, totae nigrae. 

 Tibiae antice graciles, latere interno sulco angusto exaratae. Femora postica longiuscula, angusta. 

 Tibiae posticae, calcaria et metatarsi fusca vel nigra, fulvo-pilosella ; metatarso calcaribus sequilongo. 



$ . Long. corp. 10, cum alis 13 millim. 



Hab. Panama, Volcan de Chiriqui 2000 to 3000 feet {Champion). 

 [3. Rhipipteryx brullei, Serv. (Tab. XI. fig. 21.) 



Rhipipteryx brullei, Serv. Orthopteres, p. 318. 2; Sauss. Miss. Scient. Mex v Orthopt. p. 357. 2. 



Xya notata, Burm. Handb. d. Ent. p. 742. 6. 



Nigra, plus minus flavo-notata, pronoti disco lineolis 2 flavis. Elytra lineola longitudinali flava. Abdominis 

 ultima segmenta dorsalia <$ in arcum sinuata ; segmentum 9 m prominulum, fere transverse quadratum, 

 lsevigatum, margine postico subrecto, in medio tenuiter depresso. Lamina supra-analis (vs) elongata, 

 tota subcanaliculata, in 3 partes consequentibus divisa : pars basalis transversa, utrinque ad cercorum 

 exsertionem incisa ; pars intermedia pagum parvum medium quadratum divisumque, nee non utrinque 

 lobum parvum angustum obferens (vel si mavis in 4 partes longitudinales divisa) ; pars apicalis acute 

 cuneiformis ac sulcata. — Long. corp. 9 -2 millim. 



Hab. Brazil (Mus. Genavense). 



Having only one specimen in my possession, I am unable to dissect the anal pieces. 

 It is very difficult to make out the structure of them with precision, if not separated. 

 Their appearance as here described may therefore be somewhat illusory.] 



[4. Rhipipteryx cyanipennis, Sauss. (Tab. XI. fig. 22.) 



Rhipipteryx cyanipennis, Sauss. Miss. Scient. Mex v Orthopt. p. 385. 5. 



<J . B. limbatce simillima, picturis sulfureis tamen latioribus, pronotoque anterius utrinque macula transversa 



2 Be 2 



