102 VltOCEEDISGS OF VHE NATIONAL MUSEUM. vol-xx. 



appearance: Ji broad black band extends from behind tbe eyes across 

 the upper part of the Literal lobes of the i)ronotiT]n, broadening; on the 

 meta/ona. lntersj)ace between the eyes moderately narrow, scarcely 

 wider than the tirst antennal joint; fastigium narrow, with sides 

 broadening: a little in front, pretty sharply defined, inclosinj; a moder- 

 ately deep sulcus, <leepest posteriorly; frontal costa rather broad, nearly 

 etjual, fadinjij out below, with a scarcely ])ercej>tible sulcus excei)ting 

 about theocellus; antennaea little more (male) or much less (female) than 

 three-fourths as long as the hind femora, orange red, paler at base. 

 Pronotum subequal, the disk nearly plane, the front border truncate, 

 the hind border obtusely annulate; median carina very slight, most 

 distinct on the metazona, cut by all the transverse sulci; lateral carinae 

 obsolete; prozoua distinctly longitudinal, a third to a fourth longer 

 than the metazona (inale) or quadrate, only slightly longer than the 

 metazona ( female). Prosternal sjune long, conical, bluntly tipped, some- 

 what retrorse, in the male considerably api)ressed; interspace between 

 niesosternal lobes about twice as long as broad iu both sexes, the meta- 

 sternal lobes attingent (male) or aijproximate (fenuile). Tegmina as 

 long as the body, brown, with a few dusky tlecks along the central 

 Held. Legs darker or lighter brownish yellow, tiecked with fuscous, 

 the hind femora bifasciate above with blackish, besides a blackish 

 base and apex; hind tibiae glaucous with a i»ale annulus at the base, 

 interrupted in the middle by a blackish glaucous ring, the spines pallid 

 at base, black beyond, ten to twelve in number in the outer series. 

 Extremity of male abdomen compressed, hardly clavate, upturned, tbe 

 supraanal plate triangular with nearly straight sides, the surface sub- 

 tectate, with a very deep and narrow percurrent median sulcus, bounded 

 by sharp ridges; furcula consisting of a pair of basally attingent, 

 mijuite, triangular denticulations, surmouuiing the ridges of the supra- 

 anal plate; cerci broad at base, scarcely twice as long as broad, sub- 

 reniform, well rounded, but little smaller on the apical half, not so long 

 as the supraanal plate; subgenital plate broader than long, neither 

 elevated nor prolonged apically, but a little compressed, so that the 

 thickened apical margin as seen from above is strongly rounded (the 

 figure was, unfortunately, drawn from a specimen in which the extreme 

 apex was slightly collapsed in drying) and subacuminate, exiending far 

 beyond the tip of the supraanal i^late. 



Length of body, male, 22.5 mm., female, 28 mm. ; antennae, male and 

 female, 9.5 mm.; tegmina, male, IG mm., female, 18.75 mm.: hind fjpmora, 

 male, 12 mm., female, 15.5 mm. 



;jsine males, 12 females. Dallas, Texas, August 18, Boll (Museum 

 Comparative Zoology; U.S.N.M. — Riley collection; S. H. Scudder); 

 Lerdo, Durango, Mexico (L. Braner). 



