JAMES A. G. REHN 
111 
the new form apparently differs in the caudal genicular lobe of 
the cephalic femora and the cephalic genicular lobe of the median 
femora being rounded and unspined. 
Type. — cf ; Madeira-Mamor6 Railroad Company Camp No. 
39, Rio Madeira, Brazil. (Stanford Brazilian Expedition; Mann 
and Baker.) [Acad. Nat. Sci. Phila., Type no. 5320.] 
Size small: form greatly compressed: surface of face obscurely puuctulate, 
of proiiotum granulose, of the entire body, except dorsum of abdomen, and of 
the tegmina more or less thickly pilose. Head with the fastigium not reaching 
to the margins of the antennal scrobes, this in form distinctly acute, sulcato- 
excavate distad, subtuberculate proximo-laterad, the apex slightly upcurved 
when seen from the side: eyes moderately prominent, short ovoid in basal 
outline : antennae greatly elongate, over two and one-half times as long as the 
body, proximal joint with a distinct spinous projection distad. Pronotum in 
general subcylindrical, faintly constricted mesad, faintly sellate, the greatest 
caudal width of the disk subequal to the cephalic width of the same and con- 
tained nearl}^ twice in the length of the disk: cephalic margin of the disk 
weakly arcuate with a suggestion of a median tubercle; caudal margin of disk 
moderately arcuate with an intimation of a median emargination; lateral 
margins of the disk formed by weak sub-strumose ridges which are strikingly 
colored, these narrowing slightly cephalad, subparallel mesad and distinctly 
diverging over the greater portion of the metanotum : principal transverse sul- 
cus placed slightly caudad of the middle, deeply impressed, continued ventrad 
over the whole of the lateral lobes; cephalic transverse sulcus equidistant 
from the cephalie margin and the principal sulcus, well impressed: lateral 
lobes distinctly longer than deep, the cephalic de])th contained about twice 
in the greatest dorsal length of the lobes; ventral margin of the lobes slightly 
but appreciably ascending caudad; ventro-cephalic angle of lobes broadly 
rounded subrectangulate, ventro-caudal angle of lobes obtuse. Tegmina 
subcoriaceous, lanceolate, reaching to the apices of the caudal femora, the 
greatest width contained four and three-quarters times in the greatest length 
of the same: eostal margin straight mesad, briefl}' arcuate proximad and dis- 
tad; sutural margin straight; distal extremity narrowly rounded: stridulating 
field in length equal to about two-thirds that of the pronotum; mirror of the 
left tegmen translucent, of the right tegmen hyaline. Wings with their greatest 
width contained one and one-half times in their greatest length: costal margin 
nearly straight, apex narrowly rounded rectangulate, periphery regularly 
arcuate. Prosternal spines elongate: mesosternal lobes rounded rectangulate; 
metasternal lobes hardly produced, arcuate; metasternal fovcolae slightly 
longitudinal. Disto-dorsal abdominal segment sinuato-arcuate distad, the 
distal half of the segment with an impressed median sulcus: supra-anal plate 
transverse trigonal, the surface slightly inflated and with a deeply impressed 
medio-longitudinal sulciform fossa, which fails to reach the somewhat rounded 
apex of the plate: cerci very short, inflated, bulbous in proximal portion, the 
apical section sharply reflexed, tapering, the immediate apex aciculate. directed 
TR.\NS. AM. EXT. SOC., XLIII. 
