ACRIDIDjE. 639 



border; fore border straight; sides rounded; hind border elongated, 

 slightly angular. Prosiernal spine stout, compressed, oblique, keeled, not 

 extending to the mesosternuna. Hind femora longer than the abdomen ; 

 hind tibiae shorter than the hind femora. Fore wings a little longer than 

 the body. 



1. EYNISACRIS EXTRANEA. 



Mas. Testacea, viridi pallido varia ; prothorax ferrugineo bivillatus ; 

 femora postica extus nigro quadrimaculata, intus nigro trimaculata ; 

 alee cinerete. 



Male. Testaceous, partly pale green. Prothorax with two ferru- 

 ginous stripes. Hind femora with four Mack spots on the outer side and 

 with three on the inner side. Wings cinereous; veins testaceous. Length 

 of the body 11 lines; expansion of the fore wings 25 lines. 



a. Monte Video. Presented by C. Darwin, Esq. 



Genus 13. CALACRIS. 



Corpus gracile, fere cylindricura. Caput et prothorax subcarinata. 

 Fastigium depressum, antice latescens. Oculi approximati, subprominuli. 

 Antennae filiformes, longae, graciles. Prothorax scaber, postice sublatescens, 

 foveolis transversis bene determinatis, marginibus subrotundalis. Prosterni 

 spina longa, gracilis, acuta. Femora poslica abdomine longiora. Alae 

 antica? corpore paullo breviores. 



Body slender, nearly cylindrical. Head and prothorax with a slight 

 keel. Head smooth ; tip of the vertex depressed, widening towards the 

 antenna?; space between the eyes narrow; front with four distinct keels, 

 nearly parallel, slightly approximating in the middle; outer keels slightly 

 diverging towards the lace. Eyes elliptical, rather prominent. Antennae 

 filiform, long, slender. Prothorax scabrous, slightly widening hindward ; 

 transverse impressed lines strongly marked; borders slightly rounded. 

 Prosternal spine long, slender, acute. Hind femora longer than the alido- 

 men; hind tibia? rather shorter than the hind femora. Fore wings a little 

 shorter than the body. 



1. CALACRIS PERMISTA. 

 Acridium permistum, Serv. Hist. Orth. 669. 

 Buenos Ayres. 



^ 2. CALACRIS SANGUINIPES. 



Acridium aeneo-oculatum, Deg. Ins. iii. 502, pi. 42, f. 11. Acridium 

 sanguinipes, Oliv. Enc. Meth. vi. 231. Serv. Hist. Orth. 670 

 Calliptamus sanguinipes, Serv. Rev. 93. 



Brazil. 



