366 NEW TROPICAL AMERICAN ORTHOPTERA 



of the length with a shallow sulcation, which is slightly deepened and broad- 

 ened at the exact middle, the disk slightly cephalad of the middle with a pair 

 of transversely disposed, elongate, subpyramidical, shallowly impressed areas: 

 lateral lobes distinctly longer than deep, the margins narrowly but strongly 

 cingulate, excepting ventro-caudad where they are broadly and sublamellate 

 cingulate, the surface with the apices of the paired dorsal figures reaching as 

 sulci to the dorsal portion of the lobes, the surface ventrad moderately undulate; 

 cephalic margin truncate, ventro-cephalic angle broadly arcuate, ventral 

 margin rounded obtuse-angulate, ventro-caudal angle very broadly and ob- 

 liquely rounded obtuse, caudal margin short, subtruncate. Tegmina coria- 

 ceous, slightly longer than the combined length of the head and pronotum, 

 reaching to the distal margin of the third abdominal segment, when seen from 

 the dorsum subquadrate in form, dorsal field faintly longer than broad, lateral 

 'field vertical, lateral margins of the dorsal field moderately arcuate, distal 

 margin of the field more distinctly arcuate than the lateral margins: lateral 

 field with its greatest proximal depth equal to about one-quarter of the length 

 of the field, uniform in depth in proximal fifth, thence distad regularly and 

 directly narrowing to the apex of the field, venation of the field weak: veins 

 of the humeral trunk strong, arcuate laterad when seen from the dorsum, two 

 in number; stridulating vein arcuate, strongly transverse, sending two com- 

 plete and one incomplete sinuate oblique veins to the largely straight median 

 vein; axillary veins two in number, well separated, strongly oblique, the 

 sutural of the two much the heavier; diagonal vein in general arcuate; post- 

 axillary veins two in number, sigmoid, well separated ; speculum trigonal, longer 

 than wide at the base, which is distal, with one diagonal dividing vein; cells 

 of apical area largely subquadrate, numerous. Wings probably absent, not 

 at all evident under the tegmina. 



Abdomen with the disto-dorsal segment produced into a linguiform structure, 

 which resembles a supra-anal plate, and is regularly narrowing caudad, distad 

 very broadly rounded, the surface impressed proximad, elevated distad, the 

 lateral margins narrowly cingulate proximad, with a pair of supplementary 

 semilunate carina: cerci extremely elongate, four-fifths as long as the body, 

 tapering : exserted internal genitalia made up of two parts, the dorsal one distad 

 composed of a pair of elongate horny valves, which are tectate in form, with a 

 proximal short tooth and a more elongate projection, which is distinctly ex- 

 panded distad ; the ventral part of the internal genitalia developed into a more 

 elevated recurved structure, which is strongly compressed, thickened along 

 the caudal margin and projecting dorsad through the interspace between the 

 extremities of the dorsal valves of the internal genitalia: subgenital plate 

 boat-shaped, strongly hollowed out, lateral margins gently arcuate laterad, 

 distad the margin is narrowly truncate with rudiments of styles. 



Limbs elongate, slender, the cephalic and median particularly sub-arachni- 

 form. Cephalic femora faintly shorter than the combined length of the prono- 

 tum and tegmina: cephalic tibiae slightly longer than the femora, t3Tnpana 

 indicated only on the cephalic face, and there by a small oval area; distal 

 spurs two in number, one on each side, large. Median femora subequal to the 



