264 BRAZILIAN ORTHOPTERA 



head directed moderately latero-cephalad; occipital outline undulato-arcuate, 

 slightly flattened mesad, the juxta-ocular sections faintly arcuato-elevate; ocelli 

 small, distinct, arranged in a strongly depressed triangle; facial scutellum one 

 and two-thirds times as broad as deep, dorsal margin obtuse-angulate mesad, 

 rounded latero-dorsad, ventral margin weakly concave, surface of plate shal- 

 lowly concavo-excavate; eyes elongate ovoid in basal outline; antennae fili- 

 form, equal to two-thirds the length of the pronotum. Pronotum moderately 

 elongate, the greatest width across the supra-coxal dilation slightly less than 

 one-third the greatest median length; collar comprising almost one-third the 

 total pronotal length, subequal in width and with generally subparallel margins 

 which cephalad round into the arcuate cephalic margin and caudad gently 

 widen to the regularly rounded supra-coxal dilation, which is one and one- 

 half times as wide as the collar; shaft relatively slender, appreciably compressed 

 in the greater portion of its length, the margins gently expanding to the supra- 

 coxal dilation and also to the subarcuate caudal margin, all of lateral margins 

 biseriate denticulate, the denticulations becoming smaller and weaker caudad, 

 on the caudal section of the supra-coxal dilation the denticulations are moder- 

 ately recurved; median hne shallowly sulcate on collar and cephalic portion of 

 shaft, not distinctly marked elsewhere, surface of collar with scattered small 

 tubercles, which are arranged in series and larger and closer bordering the 

 median sulcus; transverse sulcus straight transverse, deep; when seen from the 

 lateral aspect the shaft of the pronotum is slightly sinuate. Tegmina not sur- 

 passing the apex of the supra-anal plate, broad, elliptical; costal margin strongly 

 arcuate proximad, then very gently arcuate to the distal section where the 

 margin is more arcuate to the rounded apex, which is more sutural than costal 

 in position, sutural margin nearly straight, shortly arcuate proximad and dis- 

 tad; marginal field very broad, in width constituting more than one-half of 

 the total tegminal width, venation of the same field forming a coarse network 

 enclosing roughly five to eight sided areas of variable size; sectors of the dis- 

 coidal area regularly obhque, the cross nervures numerous and moderately 

 regular; anal vein distinctly arcuate proximad, thence straight oblique, joining 

 the sutural margin two-fifths the length of the latter from the base, axillary 

 veins three in number. Wings reaching almost to the tegminal apices. Abdo- 

 men strongly depressed; supra-anal plate moderately transverse, the median 

 section broad sublinguiform, the lateral portions narrow; cerci reaching nearly 

 to the apex of the subgenital plate, stout, joints very short, apex moderately 

 acute; subgenital plate compresso-rostrate. Cephahc coxae very slightly 

 longer than the shaft of the pronotum, distinctly compressed, trigonal in 

 section, dorsal margin biseriate spinose, the spines directed distad, the larger 

 ones numbering six, ventral margin with eight large recurved spines, between 

 which are smaller teeth generally placed one between each spine, external 

 margin with a numerous series of short recurved teeth, ventro-lateral face with 

 a few dentiform tubercles, internal face with numerous low tubercles; cephaUc 

 femora about four-fifths as long as the entire pronotum, moderately slender, 

 greatest depth of the femora less than a fourth of the greatest length of the 

 same, dorsal margin nearly straight, ventro-external margin with five spines 

 of which the proximal one is larger than the subequal median three and the 

 distal small one, discoidal spines three in number, ventro-internal margin 



