266 ESSAI SUR LES ACRIDIENS 



pronoti minus elevata, processu pone geniculos posticos extenso; 

 antennis brevioribus crassioribusque. 



Long, corporis, (5^9» ^^l^ mm., pronoti, 9-13 mm., fem. post., 

 5,5-7 mm. 



Acrydium granulatum Kirby, Fauna Bor. Amer. Ins. 251. 



Tetrix ornata Harhs, Rep. 3 éd. id. 186. 



Tettix granulata Scudder, Journal Bost. Soc. N. H. 1862. 

 p. 474. - Thomas, Syn. p. 182. 



Tettix gramilatus Scudder, List, of Orth. coU. by Dr. A. S. Pac- 

 kard, etc. 1880. p. 28. 



Loc. Colorado, Vancouver (ma colL) 



19. T. cucuLLATUS Burm. 



Cette espèce qui ne m'est pas connue en nature diffère fort peu 

 du T. granulatus selon M. Scudder. Voici du reste la description 

 comparative que donne cet auteur : 



Differs from. T. granulata, v^hÀohii most resembles, in having 

 the vertex very narrow, slightly less than tlie diameter of the 

 mucli inflated eyes, the front eut of square, and slighly hollowed, 

 not projecting outward so far as the eyes ; the pronotum is broader 

 and more compact over the thorax, more suddenly sloped ofFbehind 

 and extending backwards nearly twice the length of the abdomen, 

 the wings overreaching sligthy : the punctures upon the wing-covers 

 are of the same size, but not so deep as in T. granulata. Length of 

 pronotum (^ 4 in. 



Tetrix cueullata Burm. Handb. 2. p. 658 (1839). 



Tettix CïùCiilUta Scadd. Journal Boston. Nat. Hist. 1862. 

 p. 475. 



Loc. Massachussets, Missouri, Georgia. 



20. T. Brunnerii sp. nov. (fîg. 22, 22a). 



Fuscotestaceus, supra nigro-biplagiato. Vertice oculo latiore, 

 medio valde coarctato, deinde anti-orsum ampliato, antice obtuse 

 angulato, medio carinato : costa frontali late sulcata, inter oculos 

 fortiter siuuata: antennis crassiusculis, brevissimis. Pronoto antice 

 truncatu, postice subulato, apicem femorum post. parum superante, 

 dorso ruguloso-punctato; carina média percurrente a latere visa 

 bi-undulata prope marginem anticum inagis compressa; angulis 

 humeralibus obtusis, carinatis, carinis lateralibus pone humeros 

 sinuatis. Elyti'is oblongis, apice rotundatis, grosse impresso-punc- 

 tatis; alis ad apicem pronoti extensis. Femoribus anterioribus 

 obscure undulatis; femoribus posticis elongatis, apicem versus 

 sensim angustatis, carinis rectis, crenulatis: articule primo tarso- 

 rum post. superne serrato, pulvillis duobus ultimis sub 5eque longis, 

 subtus rectis. 



