200 PROCEEDINGS OF THE ACADEMY OF [May, 



declivent cephalad; interspace between the eyes equal in width to one 

 of the eyes, this area supplied with a median impressed point : f asti- 

 gium of medium width, bilobate and angularly reflexed: face mod- 

 erateh' retreating, broadly deplanate: ej^es as prominent as usual in 

 the genus, strongly projecting cephalad, when seen from the side the 

 form is ovoid: antennse surpassing the body in length; proximal 

 joint strongly inflated; second joint moderately inflated. Pronotum 

 of the type usual in the genus, distinctly elongate, metazona well 

 produced, greatest width of the pronotum contained twice in the 

 greatest length of the same: cephalic margin of disk shallowly arcu- 

 ate-emarginate, caudal margin strongly arcuate; principal sulcus 

 deeply impressed ; metazona equal to two-fifths the length of the whole 

 disk; a fine medio-longituchnal impressed line present cauclad on the 

 disk; three incomplete transverse sulci indicated on the j^rozona: 

 lateral lobes two and one-half times as long as their depth, the margin 

 arcuate from the cephalic margin of the disk to the very shallow 

 humeral sinus, faintly flattened ventro-cephalad, caudal margin in 

 general oblique subtruncate from the sinus to the arcuate caudal 

 margin of the disk. Tegmina with length slightly exceeding that of 

 the body, narrow, the greatest "svidth contained over seven times in 

 the length: margins in general straight, subparallel; apex rather 

 narrowly rounded, sutural in position: discoidal vein straight, oblique, 

 joining the costal margin at about its proximal third; number of rami 

 in the marginal field sixteen, these straight and weakly oblique in 

 trend; ulnar vein triramose distad; transverse nervures straight, 

 weakly oblique, in general evenly spaced: tympanal field largely 

 covered by the pronotal extension. Wings surpassing the tegminal 

 apices by half the length of the tegmina, moderately acuminate. 

 Penultimate disto-dorsal abdominal segment large, subcucuUate, 

 distal margin broadly arcuato-angulate, the mesal portion of the mar- 

 gin with an overlapping transparent bisinuate lamellation, visible 

 only under fair magnification: disto-dorsal abdominal segment ver- 

 tical, largely under the penultimate segment, roundly depressed 

 mesad, roundly elevated disto-laterad; free margin with a median 

 very deep U-emargination, laterad of which are paired V-emargina- 

 tions of subequal depth, the processes between the three emargina- 

 tions compressed, subfalciform, with their apices subacute and di- 

 rected ventrad; laterad of the lateral emarginations the segment is 

 produced into subconchate projections, which have a thickened ridge 

 along their dorsal margin and are distinctly concave ventrad, when 

 seen from the side the projections are spatulate, angulato-arcuate 



