164 PROCEEDINGS OF THE ACADEMY OF [May, 



one-half times in its greatest \iidth: cephalic and caudal margins 

 very faintly arcuate, subparallel, the caudal of greater extent than 

 the cephalic, lateral margins l)roadly and strongly arcuate, latero- 

 cephalic angles obsolete, latero-caudal angles very faint, greatest 

 width situated slightly caudad of the middle : surface of the disk with 

 a faint, discontinuous, medio-longitudinal impression, also with three 

 pairs of poorly defined impressions, the caudal pair practically de- 

 limiting the disk latero-caudad; lateral portions of the pronotum 

 semihyaline, weakly deflexed. Tegmina elongate lanceolate, the 

 greatest width contained about three and one-half times in the great- 

 est length: costal margin moderately arcuate in proximal third, 

 straight thence to the moderately arcuate distal fourth ; sutural mar- 

 gin of similar form, but the distal arcuation is somewhat more exten- 

 sive; apex rounded acuminate, nearlj^ median in position: marginal 

 field of medium width, sharply subdeplanate, extending to the proxi- 

 mal third of tegmen; scapular field broad, comprising but slightly 

 less than half the entire tegminal width; anal field subpyriform, com- 

 prising slightly less than one-third the sutural length: costal vein 

 twelve in number, obUque, somewhat sinuate and irregular; discoidal 

 vein bifurcate distad, the sutural ramus sending two rami to the distal 

 section of the sutural margin; median vein in general parallel to the 

 discoidal vein, reaching the sutural margin proximad of the discoidal 

 rami, sending two to three strongly oblique rami suturad ; ulnar vein 

 bifurcate; anal sulcus strongly arcuate proximad, straight oblique 

 thence to the apex, which is very briefly arcuate; axillary veins five 

 in number, poorly defined. Wings with the intercalated field rela- 

 tively large, its axial length about equal to one-third that of the re- 

 mainder of the wing, strongly arcuate distad, subrectangulate proxi- 

 mad: costal veins eleven in number, the three proximal ones springing 

 from the mediastine vein, the proximal nine all distinctly elongate 

 clavate; discoidal vein straight, simple except for the costal veins; 

 medio-discoidal area broad, its width at broadest point almost equal 

 to that from discoidal vein to costal margin, divided into more or 

 less distinctly quadrate areas by eleven transverse veins; median 

 vein straight except for curving costad toward the discoidal vein near 

 its apex, simple except for several rudimentary rami distad; medio- 

 ulnar area narrow, distinctly less (at broadest points) than half as 

 wide as the medio-discoidal area; axillary vein biramose. Subgenital 

 plate^^ of the slightly asymmetrical type, with the large, compressed 



1^ The condition of the material is such that we have refrained from making any 

 effort to ascertain the features of the supra-anal plate. 



