256 MEMOIRS ON THE COLEOPTERA 



interval toward base; pygidium subevenly convex, two and a third 

 times as wide as long, minutely, remotely punctulate, less sparsely 

 and more distinctly near the base, the minute umbo very indistinct. 

 Female not narrower but longer than the male, the head rather 

 shorter, the tubercle as in satyrus, the prothorax much less transverse 

 than in that species, not quite one-half wider than long and with 

 more strongly and subevenly arcuate sides, the sculpture fine, feeble, 

 becoming dense and rugose toward the apical angles; basal bead 

 very thick and strong but abruptly and completely interrupted for a 

 very short distance at the middle; elytra large, much longer than 

 wide and slightly wider than the prothorax, the sculpture scarcely 

 stronger than in the male; pygidium shorter than in that sex and not 

 quite so convex, finely, rather loosely but distinctly punctate, the 

 punctures becoming gradually coarse and deep but not closer basally. 

 Length (i cT, 2 9) 28.5-30.0 mm.; width 15.0-15.5 mm. Arizona 

 (probably southern) faunus Csy. 



Last palpal joint much more slender, but feebly inflated internally behind 

 the middle 4 



4 Male oblong-oval, strongly convex and polished, dark castaneous, 

 scarcely at all paler beneath; head distinctly more than a third as 

 wide as the prothorax, moderately rugose, shining, the reflexed 

 apex strongly bilobed, the horn stouter than in any other species, 

 its base occupying more than half the entire width and extending to 

 within a short distance of the clypeal apex, narrowed gradually, 

 then more rapidly, finely pointed at tip, strongly arcuate but only 

 a very little longer than the head; anterior canthus of the eyes short, 

 broadly sublongitudinally and feebly sinuate and with the usual 

 very dense and conspicuous fringe; prothorax a little more than 

 one-half wider than long, throughout nearly as in satyrus, the pro- 

 jection from the middle of the upper margin of the cavity broader 

 and broadly bilobed; elytra fully as long as wide, barely visibly 

 wider than the prothorax and four-fifths longer, viewed from above, 

 rounded evenly in almost apical half; sculpture feeble and super- 

 ficial, consisting of series of small open annuli, the series broadly but 

 only very feebly impressed, the annuli confluent in the sutural 

 series but, on the disk, becoming obsolete posteriorly; pygidium 

 nearly two and one-half times as wide as long, as usual more convex 

 basally than apically, the minute umbo extremely feeble; punctures 

 minute and sparse throughout, becoming confluent and rugulose at 

 the extreme lateral ends. Female unknown. Length (cf) 23.5 mm.; 

 width 14.0 mm. Wisconsin obsolescens n. sp. 



Male very short and stout, oblong, not very shining, obscure castaneous, 

 barely paler beneath; head small, loosely rugulose, the apical carina 

 deeply bilobed as usual; horn broad at base, rapidly and evenly 

 tapering, very acute at tip, feebly arcuate and nearly one-half 

 longer than the head; base of the clypeus forming a prominent pro- 

 jection at the sides, the eye-canthus thence posteriorly oblique, 

 straight and much less prominent, being very different from that of 

 the preceding species in this respect, as the clypeal base is there 

 retracted at the sides, the sinuate canthus being more prominent; 



