138 OETHOPTEROUS GROUP INSARAE 



the male which has a distinct compressed medio-marginal elevation 

 and in the ovipositor of the female being more scabrous on the disk. 

 Type. — cf; Jlmulco, Coahuila, Mexico. November. (Law- 

 rence Bruner.) [Hebard Collection ex Bruner.] 



Description of Type. — Size rather small; form moderately elongate. 

 Head with the greatest breadth ventrad of the eyes contained one and one- 

 half times in the greatest depth of the head; occiput very short, subinfiated, 

 very weakly declivent to the fastigium, considerably declivent to the an- 

 tennal scrobes; fastigium subcompressed, lateral margins arcuato-elevated, 

 converging cephalad, immediate apex very low and narrow, medio-longi- 

 tudinal sulcus well impressed; frontal fastigium acute, very narrowly in 

 contact with the fastigium of the vertex; face evenly rounded transversely, 

 no distinct elevated ridges present; eyes moderately prominent, in outline 

 elliptical, the greatest width contained about one and one-half times in the 

 depth of the same, the depth subequal to that of the infra-ocular portion of 

 the genae; antennae imperfect. Pronotum strongly sellate, appreciably 

 inflated ventrad, the greatest transverse width across the ventral portion of 

 the lateral lobes subequal to the length of the pronotal disk; disk con- 

 siderably constricted mesad, somewhat elevated caudad and with the 

 greatest caudal width about two-thirds of the length, cephalic margin 

 of disk arcuato-emarginate mesad, arcuato-subproduced latcrad, caudal 

 margin of disk obtuse-angulate with the immediate angle rounded, disk 

 broadly rounding into the lateral lobes, the faintest possible indication 

 of converging angles present on the prozona, rounded indications of 

 shoulders present in the usual positions ; transverse sulcus distinct, con- 

 tinuous, on the disk forming a median rectangulate figure; lateral lobes 

 slightly longer than deep, cephalic margin sinuate, ventro-cephalic angle 

 subrectangulate, ventral margin subarcuato-emarginate cephalad, sub- 

 arcuate caudad, ventro-caudal angle rounded, caudal margin obliquely 

 arcuato-truncate, humeral sinus obtuse-angulate and broad surface of the 

 metazonal section of the lobes sub-bullate. Tegmina about twice as long 

 as the body, elongate lanceolate, narrow, subequal; lobate marginal field in 

 length about equal to one-fourth of the tegminal length, similar in form to 

 that found in other species of the genus; costal margin gently curving distad 

 to the rounded apex; stridulating field slightly longer than the disk of the 

 pronotum, its greatest width about two-thirds of its length, anal vein regu- 

 larly arcuate, sutural margin of field broadly arcuate at the apex of the strid- 

 ulating vein, distad of which it is subsinuate, stridulating vein heavy, ob- 

 lique, arcuate, speculum with the external outline subarcuate; discoidal 

 vein with three rami placed in distal two-fiftbs of tegmina; anterior ulnar 

 vein reaching sutural margin of tegmina slightly distad of middle, with three 

 well defined rami. Wings surpassing the apex of the tegmina by about a 

 third the length of the latter. Abdomen subdepressed; proximo-dorsal 

 abdominal segment having a greatly compressed subtrigonal disto-mcdian 

 elevated process; disto-dorsal abdominal segment with the distal margin 



