1914.] NATURAL SCIENCES OF PHILADELPHIA. 79 



Dichopetala falcata n. sp. 



This species belongs to the same section of the genus as mexicana, 

 but differs in the greater general size, the shorter limbs of the male, 

 in the tegmina being overlapping in the female, the male subgenital 

 plate being without exserted lobes, in the same portion in the female 

 being distinctly emarginate and in the greater length of the ovipositor. 

 Type: cf ; Tepic, Mexico. (Eisen.) [Hebard Collection.] 

 Description of Type. — Size quite large (for the genus); form 

 comparatively robust. Head with its greatest width contained about 

 one and one-half times in the depth; occiput well inflated, steeply 

 declivent to the very short, compressed, and sublamellate fastigium, 

 the apex of which is very bluntly recurved, very slightly separated 

 from the apex of the facial fastigium; eyes small, elliptical in outline, 



Fig. 3. — Dichopetala falcata n. sp. Lateral outline 

 of type. (X2.) 



the length about equal to half that of the infra-ocular portion of the 

 genae; antennae elongate, proximal joint subdepressed. Pronotum 

 with the greatest dorsal length subequal to the greatest width across 

 the ventral portion of the lateral lobes, dorsal line when seen from the 

 side straight, the whole dorsum slightly constricted mesad when viewed 

 from the dorsal aspect; cephalic margin of disk moderately arcuato- 

 emarginate, caudal margin truncate; but a single complete transverse 

 sulcus present, this entering the disk laterad at the middle and on the 

 middle of the disk strongly arcuate caudad; lateral lobes distinctly 

 longer than deep, the greatest depth contained one and one-half 

 times in the length of the same, ventro-cephalic angle very narrowly 

 rotundato-rectangulate, caudal margin obliquely rotundato-truncate, 



