154 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XX. 



long as (female) the hind femora, ferruginous, more or less infuscated 

 apically. Pronotum subequal on the prozona, the nietazoua expanding 

 gently, the front margin subtruncate, the hind margin obtusely angnlate, 

 the angle well rounded, the disk gently convex, passing insensibly into 

 the lateral lobes, the median carina slight on the metazona, indicated 

 only by a pallid line on the prozona, the metazona closely and delicately 

 punctate, the prozona a little longitudinal (male) or quadrate (female), 

 slightly longer than the metazona. Prosternal spine long, conical, 

 erect, blunt, a little shorter in the female than in the male; sternum 

 sparsely punctate, the interval between the niesosternal lobes consid- 

 erably more than twice (male) or fully twice (female) as long as broad, 

 the metasternal lobes attingent over a considerable space (male) or 

 approximate (female). Tegmina slender, gently tapering, well rounded 

 at tip, surpassing considerably the tips of the hind femora, without 

 markings; wings ample, pellucid, the veins and cross veins glaucous, 

 more and more infuscated apically. Femora green, or more or less 

 infuscated or embrowned, the hind pair rarely having the upper face 

 infuscated with feeble, never distinct, fuscous clouds, the genicular arc 

 more or less testaceous above; hind tibiae very faintly incurved, green 

 becoming feebly flavescent apically, the spines rather short, pallid 

 green, briefly black tipped, ten in number in the outer series. 

 Extremity of the male abdomen subclavate, upturned, the supraanal 

 plate subclypeate, narrowing gently in the basal, rapidly in the apical 

 half, slightly constricted in the middle of the basal half, the apex 

 rectangulate, the sides broadly and considerably elevated, the rest of 

 the surface plane with a scarcely perceptible median sulcus, except 

 apically where it is slight; furcula consisting of a pair of very large, 

 broad, depressed plates, originating at the base of the last dorsal 

 segment and reaching almost to the middle of the supraanal plate, 

 subequal and attingent for half their length, beyond with their inner 

 margin roundly excised, the apex obliquely and broadly truncate, so that 

 the inner apical angle is acute; cerci rather small, rapidly narrowing 

 on the basal half by the declivence of the upper margin, beyond equal, 

 compressed cylindrical, blunt tipped, straight, distinctly shorter than 

 the supraanal plate and not greatly surpassing the last ventral 

 segment; subgenital plate moderately narrow, subequal, the lateral 

 margin straight, the apex not in the least elevated and but feebly 

 prolonged, strongly rounded as viewed from above. 



Length of body, male, 23 mm., female, 28.5 mm.; antennae, male, 

 13 mm., female, 9.5 mm.; tegmina, male, 21 mm., female 23.5 mm.; 

 hind femora, male, 12 mm., female, 14.3 mm. 



Seven males, eight females. El Paso, Texas, November (U.S.N.M. 

 Eiley collection; L. Bruner); Albuquerque, Berualillo County, New 

 Mexico, August, Snow (University of Kansas); Las Cruces, Donna Ana 

 County, New Mexico, October, ovipositing, T. D. A. Cockerell; Fort 

 Grant, Graham County, Arizona (U.S.N.M. Biley collection). 



