170 ritOCEEDiyGS or THE NATloy.ll. MISEUM. VOL. XX. 



sea irely elevated above the inonotum, tlie intersijuce between tlie eyes 

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

 antennal joint; fasti^iiun somewhat stronjrly declivent, broadly and 

 rather deeply (male) or shallowly (feuj.ile) suleate; frontal eosta rather 

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

 space between the eyes, finely and iriejrularly }uinctate throu<ihout, but 

 more sparingly 1" low than above, s»dcat«^ at and a little below the 

 ocellus; eyes moderately larjie, nuMlerately prominent, lon<.fer tlian tlic 

 intraocular ])ort ion of the <>cnae; antennae rufo testaceous, about tiuee 

 fourths (male) or less than three fifths ' female) aslon^; as the hind femora. 

 Pronotum sube(|ual, expanding- feebly on the metazoiia, luteocastane 

 ous, tlie 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 formin<^ subdistinct lateral cariuae, into tlie 

 anteriorly tumid vertical lateral l<»bes; Uicdian carina percurrent, but 

 on the prozona rather feeble au<l nniform; front margin truncate, nar- 

 rowly sul)emar<iiiiate, hind mai. in obtusangulate; prozona longitudi- 

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

 ruguloso i)unctate metazona. Prosternal S})ine short, stout, appressed 

 cylindrical, very obtuse; interspace between mesosternal lobes morv» 

 than twice as long as broad, broadening posteriorly (nude) or sub^piad- 

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

 femora, moderately broad, distinctly tajtering, rufo-fuscous, feebly iriac 

 ulate with black along the middle line. Fore and middle feuKU'a of 

 male rather strongly tunud; hind femora pale tlavo-testaceous, flecked 

 with black in oi)en transverse fasciations on the upper half, at base, 

 Just before, and somewhat behind the middle, the geniculation ^'ithtlic 

 base of the lower genicular iobe black, the outer halfo^ ..he ^ferior 

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

 lar si)()t, the spines black beyond the base, ten to twelve, usually eleven, 

 in 7. '.mber in the outer series. Extremity of male abdomen clavatc 

 strongly recurved, the supraanal plate triangular with rather broad ainl 

 subclepsydral median sulcus, bounded by not strongly elevated rounded 

 walls; furcnla consisting of a i>air of rather coarse, parallel, basally 

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

 siij)raanal i)late; cen.:i subfalcate, tapering more rapidly in basal thiiii 

 in .apical half, regularly curved upward, compressed, strongly roun<l« <1 

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

 pyranndal and strongly elevated apically, the apical margin mu* 1> 

 thickened but notched by a deep mesial contraction, which separates 

 two rounded bosses. 



Length of l)o<ly, male, 22 mm., female, 26 mm.: antennae, male (est. i, 

 mm., female, 8 mm.; tegmina, male, 18 mm., female, 20 mm.; hiii'l 

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



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

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



