1914.] 



NATURAL SCIENCES OF PHILADELPHIA. 



83 



verging caudad from the cephalic margin to the middle, thence 

 decidedly diverging to the caudal margin; transverse sulcus rather 

 weak except at median line, crossing margins of disk mesad, broadly 

 V-shaped on disk; lateral lobes with the greatest depth contained 

 one and two-thirds times in the greatest dorsal length of lobes, 

 cephalic margin straight, ventro-cephalic angle obtuse, ventral 

 margin obliquely sinuato-truncate, ventrorcaudal angle more or less 



Fig. 6. — Dichopetala serrijera 'n. sp. Lateral outline of 



type. (X 3.) 



broadly rounded, caudal margin obliquely subtruncate except for a 

 short dorsal section which is truncate with the caudal margin of the 

 disk. Tegmina subequal to four-fifths the length of the pronotal 

 disk, width of discoidal and anal fields subequal to the caudal width 

 of pronotal disk; marginal field broad, costal margin gently arcuate, 

 strongly arcuate distad, distal extremity of whole tegmen obliquely 

 truncate, sutural margin strongly obtuse-angulate produced at the 

 apex of the stridulating vein, distad of this pro- 

 jection straight and rounding into the distal 

 margin; stridulating vein decided, straight, distal 

 portion of stridulating field with anastomosing 

 short cross veins. Disto-dorsal abdominal segment 

 with main portion of same truncate distad, a 

 broad triangular impressed area indicated; supra- 

 anal plate trigonal with the apex briefly and 

 narrowly fissate; cerci with the proximal half 

 robust proximad, thence decidedly tapering, at the 

 middle the shaft is bent rather sharply meso- 

 dorsad, subdepressed and slightly expanded at the apex, the margins 

 proper unarmed, dorsal face\\-ith an elevated ridge bearing ten to eleven 

 teeth of unequal width but subequal length, the distal extremity of 



Fig. 7. — Dichopetala 

 serrijera n. sp. 

 Outline of apex of 

 abdomen of type 

 from dorsum. 

 (X 3.) 



