248 BRAZILIAN ORTHOPTERA 



short proximad, increasing in length distad: palpi with third and fourth joints 

 subequal in length, slender, but fourth slightly expanding distad; fifth joint 

 about one-half again as long as the fourth joint, of the conventional form for 

 this segment. Pronotum transverse elliptical, deplanate, greatest length con- 

 tained nearly one and three-fourth times in the greatest width, which is faintly 

 caudad of the middle: cephalic margin gently arcuate, latero-oephalic angles 

 hardly indicated, lateral margins broadly and strongly rounded, caudo-lateral 

 angles but slightly more apparent than the latero-cephalic ones, caudal margin 

 faintly arcuate: in transverse section the pronotum is gently arcuate. Tegmina 

 slightly surpassing the apex of the abdomen, elongate lanceolate, in greater 

 part subequal in width, the greatest width contained about three and one-half 

 times in the greatest length: costal margin distinctly arcuate proximad and 

 distad; sutural margin briefly but strongly arcuate proximad, the scutellum 

 being exposed between the tegmina, distad the sutural margin is more strongly 

 arcuate than the costal margin; apex of the tegmina narrowly rounded acute- 

 angulate, nearer the costal than the sutural margin : marginal field narrow, well 

 reflexed, reaching to the middle of the tegmen; scapular field broad, occupying 

 at its greatest width about two-fifths of the entire tegminal width; anal field 

 elongate, acute pyriform: discoidal vein arcuate proximad, thence straight to 

 the apex, in the scapular field with nine distinct rami, some of which are 

 bifurcate; median vein paralleling the discoidal vein but well separated from 

 the same, bifurcate at the distal third, the sutural branch biramose, the main 

 vein with three oblique rami proximad of the furcation; ulnar vein short, 

 ol:)lique; anal vein strongly arcuate proximad, thence straight oblique, reaching 

 the sutural margin at proximal third; axillary veins three in number, well 

 separated. Wings reaching to the apex of the tegmina: mediastine vein 

 involved in the costal ramifications, costal veins numbering at least nine, some 

 bifurcating, all poorly defined and weakly or not at all clavate; discoidal vein 

 faintly sinuate proximad, elsewhere nearly straight, reaching to the proximo- 

 cephalic angle of the appendicular field; median vein paralleling the discoidal 

 vein, unbranched, separated from the discoidal vein by a uniform area generally 

 less in width than the medio-ulnar area, the medio-discoidal area divided by 

 regular cross- veins into eight to nine subquadrate sections; medio-ulnar area 

 with several cross- veins distad; ulnar vein simple; axillary vein biramose; 

 appendicular field with its length subequal to one-third that of the remainder 

 of the wing at the dividing vein, semi-ovate in distal outline, basal form obtuse- 

 angulate. Supra-anal plate transverse trigonal, the margin faintly sinuate 

 laterad and the apex well rounded; cerci broad, depressed, incomplete in the 

 unique type; subgenital plate short, relatively narrow as it falls far short of 

 the width of the disto-ventral abdominal segment, the margin converging 

 laterad and produced mesad into an acute process, which is faintly elevated 

 distad; styles situated at the base of the process and compressed cultriform, 

 acute, unequal in size, the dcxtral the larger, but of relatively similar form : of 

 the internal genitalia elongate paired processes, having the same general 

 divergence and direction of the styles, project distad of the external genital 

 features, while an unpaired arcuate needk^-like process is also evident. Femora 

 unspined beneath; cephalic femora with v(>ntro-cephalic margin bearing a dis- 

 tal spine; no dorsal genicular spine on cephalic femora, median and caudal 



