104 PRODROMUS OEDIPODIORUM. 
17. Genus Tropidolophus, Thom. 
Tropidolophus, Thomas, Acrididæ of North-America, 1873. 
Corpus sparse verruculosum. Tempora nulla, in plano verticali laterali jacentia. 
Costa facialis læviuscula, canaliculata, in fronte G° quam infra ocellum latior. Oculi 
prominuli, elliptici, minores. Alarum vena discoidalis haud furcata; area furcæ venæ 
mediæ lata, scalari-venosa, apice polygonali-reticulata. Venæ radiatæ ut consuete 
rectæ ‘. — Femora postica gracillima. Arolia minuta. 
A genere Pyrgodera vix separandum, et quammodo repetitionem hujus typi in 
formam Araericanam sistens. | 
1. T. formosus, Say. — Gryllus formosus, Say, Amer. Ent. (Ed. Le Conte) I, 78 ; 
PI. 34, f. 8. — Tropid. formosus, Thom. Acrid. 138. 
Læte viridis. Caput antice et infere pronotumque sparse granosa; in érisla, præ- 
cipue prozonæ confertim albido-verrucosum ac granosum; cristæ margo superior 
valde areuatus, in medio per incisuram in partes 2 divisus, parte postica valde denti- 
culata, parte antica crenulata ; crista in prozona tota lamellaris, utrinque costam verti- 
calem obferrens, in metazona basi tumescens, margine lamellari; ejus latera in costa 
prozonæ et in medio ad sulcum typicum dentalo-verruculosa, fasciisque 2 verticalibus 
luteis. Sulcus typicus in lobis lateralibus valde impressus, ad dorsum C-formiter arcua- 
tus, in crista tenuis, obsoletus. — Pronotum de reliquo plus minus luteo-pictus; lobi 
laterales in prozona nitidi, fusco-plagiati, fascia obliqua lutea. — Elytra punctis vel 
maculis nonnullis fuscis in loco consueto fasciarum conspersis, apice sabmembranaceo 
sat irregulariter reticulato. — Alæ late miniatæ vel sanguineæ, apice vitreo, nec non 
fascia obsoleta fusca, plus minus evanida; area media quam area ulnari dimidio 
angustiore. — Femora postica viridi-fasciata, latere externo in carinulis angulatis 
polito-granoso. Tibiæ post. sanguineæ. — Var. Alarum fascia fusca in venis rufo- 
radiata, antice evanida. —- Long. çÿ 32; EL. 31 mill. — Amer. boreal.; Colorado. 
! Page 49 (9,9), nous avons dit : « venæ radiatæ flexuosæ. » C’est là une erreur provenant de 
l’examen d’un individu ayant séjourné dans l’alcoo! dont les nervures alaires étaient déformées, 
J 
