4IO CASEY 



metallic lustre, the pubescence very short, sparse and inconspicu- 

 ous ; head rather coarsely and sparsely punctured centrally, finely 

 and sparsely in the transverse subbasal depression somewhat as in 

 tenebrostis and occipitalis^ the coarse punctures longitudinally con- 

 fluent toward the fine but pronounced orbital carinaj, the epistoma 

 very obtusely and ogivally rounded ; prothorax ( 9 ) three-fifths 

 wider than long, very shining, the apex three-fourths as wide as 

 the base, the sides feebly and evenly arcuate from the acute and 

 uneverted basal angles to the apex, becoming nearly straight 

 anteriorly, the apical angles small, acute, anteriorly prominent 

 but not much prolonged and not at all everted, the thickened 

 margin broader basally, densely punctulate as usual ; ridges rather 

 strong, parallel, feebly arcuate and very short, obsolescent at 

 about the middle, the depression distinct behind the elevated an- 

 terior margin, the latter on a level with the crests of the ridges ; 

 punctures rather coarse, deep, very sparse medially though be- 

 coming very fine and closer near apex and base, moderately fine 

 but deep, evenly distributed and not very close-set laterally ; elytra 

 nearly as in canalictilatiis^ two-fifths wider than the prothorax 

 and more than three times as long, the humeri strongly rounded, 

 the punctures notably coarse, very deep and unusually close-set, 

 with scarcely impressed lines of still coarser punctures suturally, 

 becoming but little coarser though dense, shallow and asperulate 

 laterally; male unknown. Length ir.8 mm.; width 5.6 mm. 

 Arizona (San Bernardino Ranch, Cochise Co.), — F. H. Snow. 



amplificans n. sp. 



Form very stout, shining, deep black, without metallic lustre, the 

 pubescence extremely fine, sparse and scarcely visible, the hairs 

 barely extending beyond the limits of the punctures ; head moder- 

 ately coarsely, loosely punctate mediallv, more closelv laterally 

 and apically, the punctures not coalescent toward the carinas, 

 which are all but completely obsolete in both sexes ; epistomal 

 lobe angularly ogival ; prothorax ( 9 ) ^''^^'g^^ three-fifths wider 

 than long, the apex fully three-fourths as wide as the base, the 

 sides very feebly, subevenly arcuate, becoming just visibly sinuate 

 toward the apical angles, the latter acute with the tip blunt, moder- 

 ately prominent and very feebly subeverted, the basal angles acute, 

 blunt at tip and not distinctly everted, the thickened margin only 

 very feebly elevated, much thickened at the apical and basal 

 angles ; ridges broad and very feeble, parallel, obsolete at about 

 the middle, the impression very feeble behind the subelevated an- 

 terior margin, the punctures nearly as in amplificans but with the 

 finer medial punctures at apex and base much sparser ; prothorax 

 ((^) still larger and less transverse, the surface evenly convex and 

 more coarsely and closely punctate, somewhat sparsely medially, 

 with an incomplete smooth line, the apical angles sharply acute 

 but only moderately prominent and scarcely everted, the basal 

 very sharply acute and evidentlv everted, the sides similarly 

 evenly and feebly arcuate; elytra rather shorter than usual, with 



