260 BRAZILIAN ORTHOPTERA 



as wide as the greatest depth, dorsal margin arcuate brace-shaped (- ' -), 



the median point sharply acute-angulate and somewhat produced, lateral 

 margins of scutellum nearly straight, subparallel, ventral margin very faintly 

 arcuate concave, margins of plate appreciably cingulate, surface of plate faintly 

 concave; eyes not prominent, not breaking the regular outline of the head, 

 internal margins nearly straight, subparallel, interspace between eyes subequal 

 to the greatest depth of the eye; antennae fihform, not exceeding the pronotal 

 length. Pronotum robust, rather short, with cephalic half rather broad, nar- 

 rowing caudad to the narrower caudal third, which is two-thirds of the width 

 of the cephalic section, greatest cephalic width contained slightly more than 

 twice in the greatest length of the same; cephalic margin of the pronotum com- 

 pi'essed arcuate, slightly and narrowly flattened mesad, passing by a distinct 

 but blunt angle into a short, straight, subparallel section, this rounding regularly 

 into the narrower caudal section, caudal margin arcuate with a slight median 

 truncation; lateral margins strongly denticulate cephalad and caudad, less 

 distinctly armed mesad, cephalic and caudal margins nearly smooth; surface 

 of pronotum regularly tuberculate and denticulate with the exception of the 

 caudo-lateral sections of the collar, which are unarmed; collar occupying two- 

 fifths of the total pronotal length, transverse sulcus deeply impressed, median 

 line sulcate caudad on collar, faintly so cephalad on shaft and weakly carinate 

 caudad on same. Tegmina falling somewhat short of the apex of the abdo- 

 men, in length about one and one-half times that of the pronotum, broad, 

 greatest total width contained nearly one and one-half times in the total length 

 of the tegmen; marginal field very broad, at greatest width forming slightly 

 more than one-third of total tegminal width; costal margin strongly arcuate, 

 slightly flattened mesad, apex very broad, obliquely subtruncate, immediate 

 apex sutural in position, broadly rounded, sutural margin nearly straight to 

 the broad apex; marginal field with the transverse rami of the mediastine vein 

 regular and but slightly oblique, humeral vein strongly and regularly arcuate, 

 sectors of the discoidal vein regularly oblique and four in number, axillary 

 veins four in number, anal vein moderately arcuate, reaching sutural margin 

 slightly proximad of middle; stigma very narrow, linear, longitudinal, situated 

 briefly proximad of middle and about one-third of greatest width of discoidal 

 field from humeral vein. Wing falling little short of tegmina. Abdomen 

 broad, depressed: supra-anal plate slightly transverse, produced meso-caudad 

 in a semi-elliptical fashion; cerci not surpassing the subgenital plate, rather 

 thick, moniliform, composed of nine articles, distal one subconical; subgenital 

 plate ample, compressed rostrate distad. Cephalic limbs very robust; cephalic 

 coxae very slightly shorter than the pronotum, in section strongly compressed 

 triquetrous, dorsal margin with erect bistn-iate spines, the larger of which arc 

 of fair size, ventral margin with a series of numerous adpres.sed recurved teeth, 

 external margin weakly tuberculate, internal face regularly and serially tuber- 

 culate ventrad, dorso-external face weakly tuberculate; cephalic femora 

 strongly compressed, deep, greatest depth contained slightly more than three 

 times in the greatest length of the same, dorsal margin nearly straight, ventro- 

 extcrnal face with six teeth, proximal longer than the others, internal margin 

 with fourteen spines increasing in length i)roximad, whore they are l)iscria(e in 

 position, discoidal spines four in number, ungual sulcus at about jiroximal 



