106 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XX. 



joint, rather broader in the female than in the male; fastigiuni shal- 

 lowly sulcate, subequal, the bounding walls low and coarse; frontal 

 costa subequal, expanding at the base, very slightly sulcate above, 

 more sulcate but not deeply below the ocellus, as broad as the inter- 

 space between the eyes, sparsely, coarsely, and biseriately punctate; 

 antennae about live eighths as long as the hind femora, slightly longer 

 in the male than in the female. Pronotuui very short and stout, sim- 

 ple, expanding a little on the metazoua; prozona quadrate (male) or 

 transverse (female), of the same length as the metazona; front margin 

 truncate, hind margin gently angulated, more prominently in the female 

 than in the male; median carina distinct but dull and equal on the 

 metazona, obsolete on the prozona; transverse sulci of the prozona 

 unusually distinct, continuous ; lateral carinae distinct but rounded ; 

 disc punctate, distantly and rather faintly on the prozona, abundantly 

 and rather coarsely but still faintly on the metazona. Prosternal spine 

 short, stout, appressed conical, blunt, in the female subtrans verse; 

 interspace between mesostemal lobes fully half as broad again as long 

 (male) or nearly twice as broad as long (female), the metasternal lobes 

 approximate (male) or distant (female). Tegmina short subfusiform, 

 scarcely longer than the pronotum, about twice as long as broad, the 

 extremity produced but rounded, the inner edges not or faintly over- 

 lapping. Extremity of male abdomen clavate, considerably recurved, 

 the supraanal plate triangular, perhaps a little longer than broad, the 

 sides straight, the tip rounded, the surface subgibbose; furcula con- 

 sisting of a pair of minute, triangular, blunt, rather distant teeth; 

 cerci simple, regularly conical, compressed at base, blunt-tipped, con- 

 siderably shorter than the supraanal plate; subgenital plate sharply 

 upturned and tumid, short-conical, several times longer than broad, the 

 extremity just below the entire apical edge produced to a blunt point. 



The general color is blackish griseous, very obscurely mottled with 

 testaceous above, dirty yellow tinged with ferruginous below; anten- 

 nae pale red at base, much infuscated beyond; a quadrate piceous 

 patch occupies the upper part of the lateral lobes upon the prozona, 

 followed immediately below by a paler tint, and occasionally edged on 

 the lateral carinae with dull testaceous. Tegmiua with some of the 

 veins of the dorsal field (for the anterior field is deflected) testaceous. 

 Hind femora testaceous, conspicuously marked with black at base and 

 tip, and by two moderately broad transverse bands, the premedian 

 angulate; hind tibiae pale red, marked with fuscous toward the base, 

 the spines black, ten to twelve, usually ten, in the outer series. 



Length of body, male, 14.5 mm., female, 21 mm.; antennae, male and 

 female, 5.5 mm.; tegmina, male, 4 mm., female, 5 mm.; hind femora, 

 male, 8 mm. female, 8.8 mm. 



Thirty males, 28 females. Colorado, Morrison, 13,000 feet (S. Hen 

 shaw; S. H. Scudder); Colorado, alpine, September (U.S.N.M. Riley 

 collection); Pikes Peak, Colorado, 12,000 to 13,000 feet, August 24 (S. 



