JAMES A. G. REHN 
95 
contained more than four times in the length; costal margin gently arcuate 
throughout but more flattened proximad; sutural margin straight for the 
greater portion of its length distad of the stridulating field, distal fifth of the 
margin oblique rotundato-truncate, the apex nearer the costal margin and ro- 
tundate-acute; mediastine vein short, irregular, ramose; humeral and dis- 
coidal veins contiguous to about the middle of the tegmen, distinctly separated 
thence; median vein diverging at the proximal two-sevenths of the tegmen, 
bifurcate faintly distad of its middle, the rami reaching the oblique portion of 
the sutural margin; ulnar vein straight, except for a faint distal curve toward 
the sutural margin; transverse nervures rather regularly spaced and quite 
distinct; stridulating field with the oblique vein strong, broad, depressed, the 
field heavily coriaceous and strongly punctato-reticulate. Wings surpassing 
the tegmina by faintly more than the length of the pronotal disk, acute. 
Prosternum unspined; mesosternum with slightly acute-angulate lobes; 
metasternum with the lobes rounded laterad, the two lobes are produced ineso- 
caudad into an acute projection around the metasternal foramen. Disto- 
dorsal abdominal segment large, distal margin deflexed mesad, when seen from 
the dorsum obtuse-angulate impressed, and when seen from the caudal aspect 
with that portion of the margin itself subtruncate with a narrow median, V- 
shaped fissure, laterad of this median section the margin is rotundato-rec- 
tangulate with a short but distinct, thick, styliform, articulate process: cerci 
rather stout, thickened distad, gently incurved and arcuate ventrad, the apex 
with a rectangulate-reflexed, acute spine, directed dorso-mesad: subgenital 
plate greatly elongate, arcuate when seen from the lateral aspect, through the 
greater portion of its length subequal in width, slightly expanding distad, the 
distal extremity rounded obtuse-angulate emarginate, ventral surface with 
three elevated ridges, the lateral or marginal ones thinner but more decided 
than the median one. Cephalic and median femora unarmed beneath: 
cephalic tibiae with three spines on the dorso-caudal margin; median tibiae 
with five spines on the same margin. Caudal femora equal to slightly more 
than two-thirds of the length of the tegmina, armed on the ventro-external 
margin with four and on the ventro-internal margin with six to seven spines, 
genicular lobes of caudal femora bispinose. 
Allotype. — 9 ; same data as type. [Acad. Nat. Sci. Phila.] 
The features here given for the female sex are the unisexual ones not given 
in the above description of the male type. Pronotum with the humeral sinus 
well rounded obtuse-angulate. Disto-dorsal abdominal segment damaged; 
ovipositor slightly more than half again as long as the pronotal disk, arcuate 
proximad, nearly straight distad, faintly and regularly narrowing in width 
throughout; apex subangularly rounded, slightly oblique subtruncate ventrad; 
surface punctulate; distal half of dorsal margin, apex and extremity of ventral 
margin serrulato-denticulate : subgenital plate broad, lateral margins arcuate- 
emarginate, coverging distad; distal margin subtruncate; in section the plate 
is elevated mesad with a pair of converging folds laterad of the same. Caudal 
femora with the ventro-lateral margin bearing as many as six spines, the ventro- 
internal margin as manj" as eight spines. 
TR.\NS. A.M. ENT. SOC., XLIII. 
