1920.] NATURAL SCIENCES OF PHILADELPHIA. 273 



emarginate with a faint median tooth, caudal margin of the disk 

 strongly arcuate with a weak, shallow median emargination; lateral 

 margins of the disk rectangulate in caudal two-thirds, olituse in 

 cephalic third, rounded in both sections, cut at one-third their 

 length from the cephalic margin by a very brief sulcus, which does 

 not extend over the disk of the pronotum, the latter with a broad 

 V-shaped figure faintly cephalad of the middle, when seen from 

 the side the portion of the disk caudad of this figure is plane, while 

 that cephalad of the same is regularly ascending cephalad: lat- 

 eral lobes of the pronotum slightly deeper than long, the dorsal 

 length contained one and one-fifth times in the depth; cephalic 

 margin arcuato-emarginate, ventro-cephalic angle rounded obtuse, 

 the ventral margin relatively short, oblique, rotundato-truncate, 

 ventro-caudal angle broadly rounded-rectangulate, caudal margin 

 flattened arcuate, slightly oblique ventro-cephalad in direction, 

 humeral sinus relatively small, but acute and sharply indicated: 

 surface of disk and lobes cribroso-punctulate, the indentations finer 

 cephalad on the disk and the dorsal section of the lateral lobes than 

 elsewhere. 



Tegmina elongate and ample, their length slightly greater than 

 one and two-thirds times the body length, the greatest width con- 

 tained two and one-third times in the greatest length of the same, 

 the general form of the tegmen acuminate ovate-lanceolate, the 

 greatest width at five-eighths of the length from the base: costal 

 margin regularly and strongly arcuate, apex slightly acute, the 

 immediate apex rather narrowly rounded, sutural margin faintly 

 arcuate distad to the distal third, thence broadly arcuate and in the 

 remainder of the margin (subapical portion) oblique subtruncate to 

 the apex: marginal field very broad in the proximal two-thirds of 

 the tegmina, distad of this point the curving of the humeral trunk 

 restricts the marginal field to a mere edging, the greatest width of 

 the field (at the proximal third of the tegmen) slightly more than 

 one-third of the greatest tegminal width and two-fifths of the entire 

 tegminal width at the proximal third; anal field relatively narrow 

 and elongate: mediastine vein short, subobsolete; rami of the humeral 

 vein, which cross the marginal field, all regularly trend in the direc- 

 tion of the base of the tegmen as they diverge toward the costal 

 margin, these rami more numerous and crowded distad; humeral 

 trunk sigmoid, the arcuate at the distal third very decided w^hen 

 compared with that at the proximal third; median vein diverging 

 from the discoidal vein very shortly before the middle of the tegmen, 



