306 Occasional Papers Bernice P. Bishop Museum 
color pattern, particularly on the pronotum, except in specimens 
of the maximum recessive coloration, in which the color contrasts 
are weakly indicated. 
From the present insect, P. robustus Perkins is readily dis- 
tinguished by its broader form, broader stridulating field of the 
male tegmina, broader female tegmina, proportionately shorter 
limbs and apparent absence of a striking color pattern. 
As no species of the genus has as yet been thoroughly 
analyzed the following description is here given. 
Size large, decidedly variable; form slender. Head with occiput 
elongate, convex, the interocular area cephalad of that portion flattened, 
this more decided than in oahuensis. Maxillary palpi with fourth joint 
approximately two-thirds as long as third (approximately three-quarters as 
long as third in oahuensis) ; fifth joint slightly longer than third, expanding 
evenly distad, with apex rather strongly obliquely truncate. Antennae 
stout and very elongate, considerably over twice body length. 
Pronotum rounded hexagonal, slightly longer than broad, greatest 
width meso-caudad, from which point the lateral (ventral) margins con- 
verge weakly cephalad and for the brief distance rounded; cephalic and 
caudal margins transverse, the latter showing a weak trace of angulate pro- 
duction; surface showing a longitudinal rounded ridge on each side, paral- 
leling the lateral margins, separating the somewhat impressed discal portion 
from the narrow and moderately concave lateral portions of the pronotum, 
and at the caudal margin the pronotum is thickened and delimited cephalad 
by a distinct sulcus, paralleling the caudal margin (this condition is very 
weakly indicated in oahuwensis). 
Tegmina of male as shown in Plate XXVII, 8, reaching to base of 
supra-anal plate. Tegmina of female considerably longer than pronotum 
though not twice as long, varying in length, represented by oval pads with 
apices broadly rounded (much as in oahuensis, not as broad distad as in 
robustus), venation distinct. Wings vestigial. 
Supra-anal plate triangular, with apex rounded, this more decided in 
female; dorsal surface concave mesad. Genital valves of male dorso-laterad 
in position, produced dorso-caudad in elongate, heavy, somewhat irregu- 
larly chitinous processes which taper distad and are curved strongly upward 
at their acute apices, these processes with dorsal portions subchitinous and 
connected in proximal half with the blunt, short, tongue-like dorso-median 
portion of the valves by a membranous web. Ovipositor longer than 
caudal tibia; varying to slightly over half as long as caudal tibia; curved 
weakly dorsad, varying to straight, with apex very weakly reflexed; apex 
thickened and grooved. Cerci of female very elongate,“ nearly as long as 
ovipositor. 
“This and the characters given below, with one exception, are of 
generic, rather than of specific value. 
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