138 MEMOIRS ON THE COLEOPTERA 



much more convex than in the preceding, distinctly alutaceous, 

 sparsely, very finely punctate, rather abruptly but not very widely 

 deplanate and transversely rugose at the sides, the plane just visibly 

 inclined upward, the edge moderately thick and uneven; elytra 

 two-fifths longer than wide, three-fifths or more wider than the 

 prothorax, widest at three-fifths, the sides arcuate throughout, 

 rapidly rounding in posteriorly, the apical lobe relatively rather 

 small; surface very even throughout, without trace of costuliform 

 lines, more strongly convex and more steeply declivous at the sides 

 posteriorly than in caliginosus and quite evidently impressed 

 along the suture except basally and apically, very strongly shining, 

 only very finely and sparsely creased, the punctures small, very 

 sparse though rather deep and distinctly defined; lateral reflexed 

 carina ending abruptly at apical fifth; abdomen polished, very 

 minutely, remotely punctulate; legs slender; tarsi short. Length 

 (9 ) 33.0 mm.; width 12.2 mm. Arizona (Baboquivari Mts.). 



satiatus n. sp. 



10 Form moderately stout, decidedly convex, black, the entire elytra dark 

 red-brown; head impressed, strongly but sparsely punctate; prothorax 

 large, a third to two-fifths wider than long, three-fourths (a 71 ) to three- 

 fifths ( 9 ) as wide as the elytra, parallel and very moderately arcuate 

 at the sides, shining, subalutaceous, strongly convex, minutely and 

 sparsely punctate, the sides reflexed and coarsely, transversely ru- 

 gose; basal impression rather transverse, well marked; elytra two- 

 thirds longer than wide, more oval and rounded at the sides in the 

 female, widest behind the middle, the apical lobe short but evident, 

 obtuse; surface strongly, evenly convex transversely, closely rugose 

 and not or but feebly shining, each with three low obtuse discal 

 costae, the outer joining the margin at basal fourth or fifth, the first 

 and second approximate at base, uniting on the declivity, the single 

 feeble line then joined by the third ridge; sutural margin also sub- 

 similarly elevated, nearly smooth, diverging from the suture basally 

 and joining the first costa at the basal margin; intervals elevated, 

 more or less along their median lines, sometimes forming broader 

 and feebler costae; side margin ending at apical fifth; abdomen finely, 

 sparsely punctate and also with extremely minute, close-set punc- 

 tulation; legs moderate, the tarsi shorter in the female as usual. 

 Length (cf,9) 23.0-24.0 mm.; width n.o mm. Arizona (Peach 

 Springs), H. F. Wickham rugatus n. sp. 



II Elytra very roughly, coarsely and densely punctato-rugose. Mod- 

 erately ventricose and flattened above, dark piceous-brown through- 

 out; head rather feebly impressed, coarsely, deeply, rather closely 

 punctate; prothorax dull in lustre, two-thirds as wide as the elytra 

 in both sexes, two-fifths wider than long, broadly and moderately 

 convex, coarsely, deeply, closely but unevenly punctate, with a very 

 feeble and obsolete impression at each lateral fourth just behind the 

 middle, the basal impression deep and distinct; sides parallel, mod- 

 erately arcuate and reflexed, coarsely, transversely rugose, the 

 edges finely, irregularly crenulate; elytra faintly shining, widest 



