366 Occasioiuil Palmers Bcniicc P. JUsliop Miisciiui 



Color pattern. ]iarticiilarly < m tltc ])roiiotiini, cxcc])t in specimens 

 of the niaxiinum recessive coloration, in which the color contrasts 

 are weakly indicated. 



From the ])resent insect, /'. rohiistiis Perkins is readiK- dis- 

 tiiii^nished 1)\- its l)roa(ler form, hroader stridulatin^- field of the 

 male tcgmina. broader female tei^niina, 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 oahuciisis. 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, slightl^^ longer than l)road, 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 pronottim is thickened and delimited cephalad 

 by a distinct sulcus, paralleling tlie caudal margin (this condition is very 

 w^eakly mdicated in oaluicasis) . 



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 oahuciisis, not as broad distad as in 

 robiisfns), 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 llie valves by a membranous web. Ovipositor longer than 

 caudal til)ia; varying to slightly over half as long as caudal tibia; curved 

 weakly dorsad, varying to straight, witii 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. 



[64] 



