352 NEW TROPICAL AMERICAN ORTHOPTERA 



ventro-caudal angle very broadly rounded, caudal margin obtuse, gently arc- 

 uate, dorsad strongly arcuate to the bottom of the subrectangulate humeral 

 sinus, the dorsal bordering margin of which is gently concave. Tegmina 

 moderately elongate, their greatest width contained slightly more than five 

 times in their greatest length, sublanceolate, the costal and sutural margins 

 in large part subparallel; costal margin very briefly arcuate proximad, distad 

 arcuate to the well-rounded apex, sutural margin rounding to a lesser degree to 

 the apex : neuration areolate, the areolets larger in the marginal field and distad 

 in the discoidal field than proximad in the discoidal field ; median vein diverging 

 shortly proximad of the middle of the tegmen, furcate at its middle; ulnar vein 

 reaching the sutural margin at about two-thirds the length of the margin itself; 

 transverse nervures rather regularly placed and forming distinct areas of 

 areolets. Wings, in repose, projecting distad of the apices of the tegmina a 

 distance subequal to the length of the pronotal disk: greatest width of one of 

 the wings contained two and one-third times in the length of the same. Pro- 

 sternum unarmed. 



Disto-dorsal abdominal segment broad, transverse, the distal portion 

 moderately depressed, faintly recurved at the periphery, when seen from the 

 dorsum the margin is broadly arcuate, the arcuation slightly flattened mesad, 

 a medio-longitudinal impression indicated, this deep and pronounced on distal 

 two-fifths, with an apprecial)le pit at the proximal end of the deep portion, 

 lateral sections of margin of plate considerably arcuate-emarginate over the 

 cereal bases: supra-anal plate prominent, produced caudad of the disto-dorsal 

 abdominal segment a distance equal to two-thirds the length of the latter, the 

 projecting portion developed into a pair of decided, rounded lobes, divided by 

 a deep, rounded, V-shaped emargination, the lateral portions of the paired 

 lobes moderately arcuate expanded and distinctly bent ventrad, median portion 

 of plate depressed proximad; dorsal surface of plate rather thickly covered 

 with short, adpressed, proximad directed bristles, ventral surface with short, 

 regularl\' placed, recurved and adpressed teeth: cerci in lateral view very 

 broad at base, the ventral margin nearly straight, dorsal margin strongly and 

 regularly descending to the middle of the cercus, proximad the dorsal surface 

 of the cercus bears an obliquely transverse, ledge-like carina, the proximal half 

 of the cercus with numerous long sensory bristles placed in pits or craters; distal 

 section of cercus obliquely depressed, sublamellate, appreciably curled dorso- 

 laterad, the form of the apex rounded acute, the depressed, sublamellate sec- 

 tion of the cercus with adpressed teeth like those of the ventral surface of the 

 supra-anal plate: subgenital plate moderately elongate, produced distad in a 

 subquadrate projection, lateral margins of distal three-fifths appreciably but 

 not strongly narrowing distad, distal margin subtruncate with a shallow, 

 median, obtuse-angulation, disto-lateral angles narrowly rounded rectangulate ; 

 no styles present. 



Limbs slender. Cephalic femora slightly longer than the disk of the prono- 

 tum ; cephalic tibiae about one and one-half times as long as the cephalic femora, 

 tympanum apert on both faces, the tympanal region appreciably inflated, 



