1914.] 



NATURAL SCIENCES OF PHILADELPHIA. 



75 



AVe here describe a topotypic female from the Hebarcl Collection, 

 (data: Cuernavaca, Mexico; January 4, 1899). 



Description. — Size medium; form subcompressed. Head with the 

 occiput subglobose, strongly descending to the antennal fossse; 

 fastigium compressed, short, subcultriform-lamellatc dorsad, apex 

 rounded when seen from the side and not projecting cephalad of the 



rig. 1. — Dichopetala mexicana Brunner. Lateral outline of topo- 

 typic female. (X 2.) 



antennal scrobes, almost touching the facial fastigium; face, genae, 

 clypeus and labrum glabrous; eyes ovate in basal outline, moderately 

 prominent; antennae incomplete. Pronotum with the greatest 

 dorsal length subequal to the greatest ventral width (across lobes) 

 of same; dorsum of pronotum with the impressed transverse sulcus 

 distinct, broadly V-shaped, placed mesad, the dorsum slightly 

 constricted at the same point; cephalic and caudal margins of disk 

 subtruncate; lateral lobes of pronotum with the 

 greatest depth contained one and two-thirds times in 

 the greatest dorsal length of the same, ventral margin 

 subtruncate, cephalic and caudal angles of the same 

 margin rounded, transverse sulcus marked only on the 

 dorsal portion of the lobes and there descending ob- 

 liquely ventro-cephalad. Tegmina very short, reaching 

 the caudal margin of the metanotum, much broader 

 than long, the greatest length contained twice in the 

 greatest width, distal margin broadly arcuate, disto- 

 costal and disto-sutural angles broadly rounded, sutural 

 margins narrowly separated. Abdomen heavy; cerci 

 very short, crassate, substyliform, the apex rather sharply attenu- 

 ate; ovipositor heavy, robust, the length half that of the caudal 

 femora, dorsal margin moderately arcuate, ventral margin straight 

 for the median three-fourths, strongly arcuate proxiinad and distad, 



Fig. 2. — Di- 

 chopetala 

 mexicayia 

 Brunner. 

 Ventral 

 outline of 

 s ubgenital 

 plate of 

 topotypic 

 female. 

 (X4.) 



