150 



PROCEEDINGS OF THE ACADEMY OF 



[Jan., 



rounded, regularly descending to the fastigium and antennal scrobes; 

 fastigium slightly elevated, compressed, linear, rounded at the apex 

 when seen from the side, not touching the frontal fastigium^ eyes 

 very prominent, subglobose, depth about one and one-half times that 

 of the infra-ocular portion of the gense; antennae with the proximal 

 joints large, slightly depressed. Pronotum sellate, dorsal length 

 little greater than caudal width of dorsum of same and distinctly 

 less than greatest ventral width of pronotum across lateral lobes; 

 cephalic margin subtruncate, caudal margin very slightly arcuato- 

 emarginate; lateral margins of disk slightly marked caudad by 

 rounded angles, elsewhere by color only, the general form of same 

 considerably narrowed mesad; transverse sulcus severing lateral 

 margins of disk mesad, represented on the disk by a median trans- 

 verse impression placed at the caudal third, but not connected with 

 the sulci severing the lateral margins of the disk; lateral lobes with 

 greatest depth contained about one and one-half times in the dorsal 

 length of the same, cephalic margin of the lobes arcuato-emarginate, 



Fig. .50. — Dichopetala tridactyla n. sp. Lateral outline of type (male). (X 3.) 



ventro-cephalic angle narrowly rotundato-rectangulate, ventral 

 margin slightly sinuato-truncate, ventro-caudal angle and caudal 

 margin very broadly arcuate. Tegmina slightly shorter than the 

 pronotum, broad, the width of the discoidal and anal fields subequal 

 to the tegminal length; costal margin slightly arcuate, disto-costal 

 angle rounded, distal margin moderately arcuate, passing into the 

 sutural margin, latter strongly rotundato-rectangularly produced at 

 the apex of the stridulating vein, distal portion of the sutural margin 

 strongly oblique; marginal field rather narrow, discoidal field short, 

 strongly ex])anding distad, anal field very broad. Abdomen with 

 lateral margins of segments subparallel, jiroximal segments sub- 

 tectate; disto-dorsal abdominal segment with the distal margin 

 arcuato-truncate, considerably arcuato-emarginate at the dorsal 



