170 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XX. 



scarcely elevated above the pronotuin, the interspace between the eyes 

 half as broad again (male) or fully twice as broad (female) as the first 

 antennal joint; fastigium somewhat strongly declivent, broadly and 

 rather deeply (male) or shallowly (female) sulcate; frontal costa rather 

 prominent, percurrent, feebly narrowed above, as broad as the inter- 

 space between the eyes, finely and irregularly punctate throughout, but 

 more sparingly below than above, sulcate at and a little below the 

 ocellus; eyes moderately large, moderately prominent, longer than the 

 in fraocular portion of the genae; antennae rufo-testaceous, about three- 

 fourths (male) or less than three-fifths (female) as long as the hind femora. 

 Pronotum subequal, expanding feebly 011 the metazona, luteo-castane- 

 ous, the metazona and especially its disk rufo-castaneous, the lateral 

 lobes of the prozona with a very broad piceous postocular band; disk 

 of pronotum very broadly convex, passing by a rounded but distinct 

 shoulder, on the metazona forming subdistinct lateral carinae, into the 

 anteriorly tumid vertical lateral lobes ; median carina percurrent, but 

 on the prozona rather feeble and uniform ; front margin truncate, nar- 

 rowly subemarginate, hind margin obtusangulate; prozona longitudi- 

 nally quadrate (male) or feebly transverse (female), as long as the feebly 

 ruguloso-punctate metazona. Prosternal spine short, stout, appressed 

 cylindrical, very obtuse; interspace between mesosternal lobes more 

 than twice as long as broad, broadening posteriorly (male) or subquad- 

 rate (female). Tegmiua somewhat surpassing the tips of the hind 

 femora, moderately broad, distinctly tapering, rufo-fuscous, feebly mac- 

 ulate with black along the middle line. Fore and middle femora of 

 male rather strongly tumid; hind femora pale flavo-testaceous, necked 

 with black in open transverse fasciations on the upper half, at base, 

 just before, and somewhat behind the middle, the geniculation with the 

 base of the lower genicular lobe black, the outer half of the inferior 

 face roseate; hind tibiae dark or light red with a feeble fuscous patel- 

 lar spot, the spines black beyond the base, ten to twelve, usually eleven, 

 in number in the outer series. Extremity of male abdomen clavate, 

 strongly recurved, the supraaual plate triangular with rather broad and 

 subclepsydral median sulcus, bounded by not strongly elevated rounded 

 walls; furcula consisting of a pair of rather coarse, parallel, basally 

 attingent, tapering, acuminate, flattened fingers, a third as long as the 

 supraanal plate; cerci subfalcate, tapering more rapidly in basal than 

 in apical half, regularly curved upward, compressed, strongly rounded 

 apically, more than twice as long as median breadth; subgenital plate 

 pyramidal and strongly elevated apically, the apical margin much 

 thickened but notched by a deep mesial contraction, which separates 

 two rounded bosses. 



Length of body, male, 22 mm., female, 26 mm. ; antennae, male (est.), 

 9 mm., female, 8 mm.; tegmina, male, 18 mm., female, 20 mm.; hind 

 femora, male, 12.5 mm., female, 14.5 mm. 



Two males, 1 female. Alaska, T. C. Mendenhall (U.S.N.M.); Spil- 

 macheen, British Columbia, July 25 (S. Henshaw). 



