314 I'lmt HKIUSiiS (fF TIIK SATKiSAL MlSHVM, v«*.Ji». 



Hpfiii' iinMl<M:ift»ly loiijf, :inpi'OMS(>(l i-ylimlriral, niHHT stout, ti llttli^ 

 ret I'oiKc; int«'i'M|»iU'«> iM'twecii ineHostcniiil IoIm's iilxMit twirt* uh Imi;,^ ;ih 

 bi'ttiul (iiiiiU*) or diMtiiK-tly tniiiMVcrHC) but iiiirrower tliuii the lobcM 

 (tViii:ih'i, tli<' iiirtiistvriiiil IoIm>m attiiif^tMit (inaie) or iiHNhM'utt'ly distant 

 (feiiiiiU'). Te^fiiiiiiii usually a littl*' surpiisHJii^, Hoinctiincs hanily attain- 

 iii^ till* tips of the liiiMl fi'inora, inodt'nih'ly br<»a(l, diHtiiictly taprriii^ 

 ill tilt' ilistal li:ilt', blackish tiisrou.s with pallid cross veins, and heavily 

 thoUKli rutlier delicately niaenlate, es|»eciaHy but not exclusively in the 

 discoidal area; uin^s ample, hyaline with the t'ee))lest possible bluish 

 tlush, the apical and anterior venation fuscous or blackish I'umcous. Fore 

 and middle t'emora of mali> somewliat tumid; hind femora very stout, 

 with prominent intV'rior carina, lirownish f'iscous with superior cloudy, 

 rather broad, dark fasiriatioii, tlu^ exterior face more <m' less testa«e<)us 

 (douded iric^adarly with fuscous, the lower face and lower half of inner 

 face bri;;ht deep red, includin;; sonietiiii(>s a part of the lower i^eniculai 

 hibes, the rest of the {^eniculation inluscated; hind tibiae slij^htly val- 

 jrate, stout, brijiht deejued, sometimes feebly inluscated iit the extreme 

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

 number in the outer si'ries. Kxtrei»iity of male abdomen strongly 

 clavat«', considerably recurve<l, the supraanal plate siibtrian<;ular with 

 broadly an;;iilate sides and subreetaufjulate apex, the surface nearly 

 plane, a little depresse<I in the apical h:ilf, with a rather shallow and 

 broad, apically narrowinjj;, percurrent median sulcus; furcnla c<uisistin^ 

 of a pair of very slijjfht, short, distant, diverjrin^ <lenticulatioiis lyin;; 

 on the outer side of the ridj^es bordeiin^ the me<lian sulcus of the supra- 

 anal plate; cerci <'onipiessed, considerably incurved or niesially bent 

 laminae, hardly three times as long as broad, jjradually <*onstri<*te(l 

 niesially, the apex well louinled but suban;;:ulati' below, the whole apical 

 portion rather deeply sulcate exteriorly, tiot reatdiing the tip of the 

 supraanal plate; iiilracercal plat«'S broad, exposed on either side of the 

 base of the cerci, narrow inj? rapidly and extending to the tij) of the 

 supriianal phite; sub«;enital plate moderately hroad, snbecjual, the apical 

 niarjiin well rounded, hardly tlarinjj:, niesially subanjiulate, not elevated, 

 entire. 



Lenjjtli of body, male. 2\ mm., female, 2S mm.: antennae, male, 11. Ta 

 nun., female, 11 mm.; tejiunna, male, H)..") mm., female, liL*..! nnn.; hind 

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



Nineteen males, 15 females. Tlalpan, Mexi<'0, Xovend)er (L. l>rnner); 

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

 ains twelve leajjues east of San Luis Potosi, Mexico, Talmer; Sierra de 

 San Mijjfuelito, San Luis Totosi, Mexico, Palmer; Zacatecas, Mexico, 

 November (U.S.N.M. — Riley collection); Soiioni, Mexico, Schott; Silver 

 City, Clrant County, >'ew Mexico, C. H. Marsh (L. IJruner). 



