288 PROCEEDINGS OP THE AMERICAN ACADEMY. 



the posterior margin beyond the anal area straight, the apex well 

 rounded, the radial veins nearly straight, the first branch simple like the 

 succeeding, and emitted far beyond the middle, all terminating near to- 

 getlier near the lower outer angle of the tegmina ; tympanum of male 

 subovate, but little longer than broad, the sides strongly arcuate, crossed 

 by a pair of strong veins ; wings broad, no longer than the tegmina. 

 All the femora unarmed beneath, the genicular lobe of hind femora with 

 a pair of minute spines at apex. Mesosternum twice as broad as long, 

 the lobes slight. Anal segment of male short, triangular, broader than 

 long, with no appendix ; subgenital plate of male of moderate length, 

 depressed throughout, tapering, deeply and angularly emarginate at apex, 

 and beyond the emargination fissate, the lobes thus formed feebly falcate 

 at tip. Ovipositor a little longer than the pronotum, the lower margin 

 strongly arcuate, the apex subacutangulate. 



A single species is known, occurring on our Pacific coast. 



Platylyra californica, sp. nov. 



Green, the tympanum of the male tegmina testaceous, the canthi of 

 pronotum posteriorly castaneous and the fore and middle legs more or 

 less testaceous. Lateral lobes of pronotum broader than long, the lower 

 anterior angle subrectangulate. Mesosternal lobes rather slight, rounded, 

 erect or suberect ; metasternal lobes small, bluntly triangular. Tegmina 

 subcoriaceous, opaque, broadest in the middle of the basal two thirds, the 

 tip well and equally rounded ; wings of the same length as the tegmina, 

 only the apical sixth of the humeral area subopaque. Legs very slender, 

 but not very long ; fore and middle tibiae spined above on each margin. 

 Anal segment of male broader than long, rounded triangular ; cerci of 

 male rather stout and cylindrical at base, but this portion only a little 

 longer than broad, bearing a long, arcuate, and slightly tortuous, a little 

 incurved, slightly compressed, pointed, corneous hook, at base half as 

 broad as the base of the cerci ; subgenital plate of male arcuate, rather 

 long and broad, depressed, tapering in the basal half, but beyond sub- 

 equal. Ovipositor slightly longer than the pronotum, rather broad, the 

 upper margin arcuate at base but beyond straight, the lower margin 

 strongly and subequally arcuate throughout, the apex subacutangulate, 

 the margins apically rufous and rather delicately and briefly denticulate, 

 the basal plica concolorous. 



Length of body, $, 13 mm.; 9, 15 mm. Pronotum, $, 4.5 mm.; 

 9, 4 mm. Tegmina, c?,9, 17.5 mm. Breadth of same in middle, (?,9, 

 6 mm. Breadth of wings, <?, 11 mm. Length of hind femora, <?, 17 



