104 
BRAZILIAN ORTHOPTERA 
tlie remainder; lateral portions of disk broadly rounding to the lateral lobes, 
appreciable but rounded shoulders present caudad, dorsad of the humeral 
sinus: lateral lobes faintly longer than deep; cephalic margin emarginato- 
truncate, ventro-cephalic angle obtuse, ventral margin oblique subtruncate, 
strongly descending ventro-caudad, ventro-caudal angle very broadly rounded, 
the whole caudal margin regularly arcuate to the subrectangulate humeral 
sinus. Tegmina surpassing the apices of the caudal femora by a distance 
slightly greater than the length of the pronotal disk, in form elongate lanceolate, 
the greatest width contained three and one-half times in the greatest length: 
costal margin regularly arcuate, except for a slight flattening in the distal 
half; apex well rounded; sutural margin moderately and regularly arcuate: 
marginal field with a number of rather regularly placed and directed, but ir- 
regularly branched and sulmbsolete, rami from the humeral vein; median vein 
diverging shortly distad of the middle, this furcate distinctly before its middle; 
ulner and median veins, their rami and cross-veins all sinuate and unstal)le in 
exact continuity; nodes paralleling the proximal half of the discoidal vein, 
four to five in number: stridulating field relatively small; stridulating vein 
strongly crassate, faintly arcuate, slightly oblique; free margin of field rounded 
obtuse-angulate at the apex of the stridulating vein. Wings surpassing the 
apices of the tegmina by a distance about equal to two-thirds the length of the 
pronotal disk : wing narrow, its greatest width contained about two and one- 
quarter times in the length of the same. Prosternum with a broad V-shaped 
structure: mesosternal lobes small, moderately arcuate laterad: metasternal 
lobes narrow, obtusely arcuato-truncate latero-caudad. Disto-dorsal ab- 
dominal segment deep, median section strongly deflexed ventrad between the 
cereal bases, terminating in a narrow, rounded protuberance, proximad from 
which extends a narrow and clearly defined sulcation; lateral sections of the 
same segment relatively broad, sub-lamellate, the ventro-distal angle subacute 
with the apex narrowlj' rounded: cerci quite elongate, cornuiform, rather 
thick at the base there with a short dorsal, arcuate carination; distad of the 
thickened base for a short distance they rather strongly and thence very 
regularly and gradually taper to the aciculate apex; the form, in general, is 
sharply falciform, being strongly arcuate in the proximal half, thence more 
gently but distinctly arcuate, their form considerably resembling that of the 
horns of the musk-ox; both faces (internal and external) of attenuate portion 
sulcate: subgenital plate short, broad at the base, strongly and regularly 
narrowing distad, the disto-median section of the margin narrowlj" arcuato- 
emarginate, this flanked by relatively short, fixed, styliform processes, lateral 
portions of the margin oblique truncate; surface of the plate with a medio- 
longitudinal carina and short, incomplete carinae at the bases of the styliform 
processes. Cephalic femora subequal in length to the pronotal disk, ventro- 
cephalic margin with five spines, ventro-caudal margin unarmed; median 
femora one and one-half times as long as the pronotal disk, \-entro-cephahc 
margin with three spines distad, ventro-caudal margin unarmed. Caudal 
femora about three-fifths as long as the tegmen, moderately bullate proxi- 
mad, very slender distad; ventro-external margin with four to five spines 
distad, ventro-internal margin with two to three distal spines. 
