1914.] NATURAL SCIENCES OF PHILADELPHIA. 85 



Remarks. — The type of this remarkable species is unique. 



Specimeyjs Examined. — 1 ; 1 male. 



Barranca, twelve kilometers north of Guadalajara, state of Jalisco, 

 Mexico, elevation about 3,500 feet, September 13, 1903 (W. L. Tower), 

 1 d". Type. [Amer. Mus. Nat. Hist.] 



Diohopetala durangensis n. sp. 



Related, as shown by the female sex, to D. falcata, from which it 

 differs in the much smaller size, the more sellate pronotum, the rela- 

 tively more prominent and larger eyes, the shorter and more abbrevi- 

 ate tegmina, the more decidedly trigonal extremity of the disto-dorsal 

 abdominal segment and in the much more robust ovipositor. The 

 available males are not mature, but they show conclusively that the 

 species has a median tooth or lobe on the cercus, while /a?ca/a has the 

 same simple, aside from which the form of the subgenital plate is 

 characteristic. As the females of all of the species except D. serrifera 

 are known, we have no hesitation in describing the species "without 



Fig. 8. — Dichopetala durangensis n. sp. Lateral outline of 



type. (X2.) 



adult males, as the possibility of the present form being the female 

 of serrifera is exceedingly remote. 



Type: 9 ; Durango, Mexico. (Palmer.) [Scudder Coll.] 

 Description of Type. — Size medium; form rather robust. Head 

 with the occiput sharply declivent to the fastigium, strongly arcuate 

 in transverse section; fastigium little elevated, slightly recurved at 

 the apex, elongate, but little compressed, shallowly sulcate dorsad, 

 ventrad touching the fastigium of the face; eyes moderately promi- 

 nent, ovate, the depth of same at least two-thirds that of the infra- 

 ocular portion of the gense; antennae incomplete. Pronotum weakly 

 sellate, broad, the greatest ventral width but slightly surpassing the 

 greatest dorsal length of disk; disk of pronotum with the lateral 

 margins, which are weakly indicated structurally by calloused lines 

 ' and strongly by color pattern, parallel to the transverse sulcus, which 



