314 PROCEEDINGS OF THE NATIONAL MUSEUM. 



spine moderately long, appressed cylindrical, rather stout, a little 

 retrorse; interspace between mesosternal lobes about twice as long as 

 broad (male) or distinctly transverse but narrower than the lobes 

 (female), the metasternal lobes attingent (male) or moderately distant 

 (female). Tegmina usually a little surpassing, sometimes hardly attain- 

 ing the tips of the hind femora, moderately broad, distinctly tapering 

 in the distal half, blackish fuscous with pallid cross- veins, and heavily 

 though rather delicately maculate, especially but not exclusively in the 

 discoidal area; wings ample, hyaline with the feeblest possible bluish 

 flush, the apical and anterior venation fuscous or blackish fuscous. Fore 

 and middle femora of male somewhat tumid; hind femora very stout, 

 with prominent inferior carina, brownish friscous with superior cloudy, 

 rather broad, dark fasciation, the exterior face more or less testaceous 

 clouded irregularly with fuscous, the lower face and lower half of inner 

 face bright deep red, including sometimes a part of the lower genicular 

 lobes, the rest of the geniculation infuscated; hind tibiae slightly val- 

 gate, stout, bright deep red, sometimes feebly infuscated at the extreme 

 tip, the spines short, black to the base, ten to eleven, usually eleven, iu 

 number in the outer series. Extremity of male abdomen strongly 

 clavate, considerably recurved, the supraaual plate subtriaugular with 

 broadly angulate sides and subrectangulate apex, the surface nearly 

 plane, a little depressed in the apical half, with a rather shallow and 

 broad, apically narrowing, percurrent median sulcus ; furcula consisting 

 of a pair of very slight, short, distant, diverging denticulations lying 

 on the outer side of the ridges bordering the median sulcus of the supra- 

 anal plate; cerci compressed, considerably incurved or mesially bent 

 laminae, hardly three times as long as broad, gradually constricted 

 mesially, the apex well rounded but subangulate below, the whole apical 

 portion rather deeply sulcate exteriorly, not reaching the tip of the 

 supraanal plate; infracercal plates broad, exposed on either side of the 

 base of the cerci, narrowing rapidly and extending to the tip of the 

 supraanal plate; subgeiiital plate moderately broad, subequal, the apical 

 margin well rounded, hardly flaring, mesially subangulate, not elevated, 

 entire. 



Length of body, male, 24 mm., female, 28 mm.; antennae, male, 11.75 

 mm., female, 11 mm.; tegmiua, male, 16.5 mm., female, 22.5 mm.; hind 

 femora, male, 14 mm., female, 15 mm. 



Nineteen males, 15 females. Tlalpan, Mexico, November (L. Bruner) ; 

 hills about San Luis Potosi, Mexico, October 15, E. Palmer; mount- 

 ains twelve leagues east of San Luis Potosi, Mexico, Palmer; Sierra dc 

 San Miguelito, San Luis Potosi, Mexico, Palmer; Zacatecas, Mexico, 

 November (U.S.N.M. Kiley collection); Sonora, Mexico, Schott; Silver 

 City, Grant County, New Mexico, C. H. Marsh (L. Bruiier). 



