148 MEMOIRS ON THE COLEOPTERA 



shorter and more slender than in planipennis (9 ), but with the first 

 joint distinctly longer than the next three combined; lustre of the 

 elytra very faintly subalutaceous and more evidently so than in the 

 preceding. Length ( 9 ) 5-2 mm.; width 2.0 mm. Arizona (southern). 



otiosus n. sp. 



9 Prothorax very short, three-fourths wider than long, less in the male, 

 the foveae linear and rather deeply impressed. Form oblong, moder- 

 ately convex, unusually highly polished throughout in both sexes, 

 black, with dark greenish-aeneous lustre above, the margins of the 

 prothorax and the suture and margins of the elytra, posteriorly, 

 pallescent; under surface blackish-rufopiceous, the epipleura pale; 

 legs bright testaceous; head nearly two-thirds as wide as the pro- 

 thorax, with moderate but very prominent eyes, the foveae very 

 minute, perforato-punctiform; antennae very slender, obscure, paler 

 basally; prothorax parallel, with subevenly and very moderately 

 arcuate sides, the apex rather deeply sinuate; base transverse, round- 

 ing laterally, the angles slightly obtuse and notably broadly rounded; 

 surface finely reflexed at the sides, smooth, the marginal flattening 

 narrow but perceptible, the foveae shallow, broadly impressed, 

 impunctate though sometimes with very minute rugulosity; elytra 

 two-fifths longer than wide, not distinctly wider than the prothorax, 

 the obliquity of the apices feebly sinuate (cf ), or straight (9 ), the 

 strise extremely fine, the intervals flat, becoming narrow though 

 scarcely convex suturally on the declivity; serial punctures distinct, 

 the punctulation of the marginal interval and apex excessively 

 minute; basal joint of the hind tarsi very long though but little 

 longer than the next three in either sex; abdomen impunctate and 

 very shining. Length (cf 9 ) 5-3~5-9 mm.; width 2.0-2.25 mm. 

 Texas (Galveston) , maritimus n. sp. 



Prothorax generally less abbreviated, the foveae more rounded and always 

 very feeble or vague 10 



10 Elytra subequal in width to the prothorax in both sexes n 



Elytra distinctly wider than the prothorax, though less obviously than 

 in fatuus and mustus 14 



II Basal joint of the hind tarsi shorter than in the preceding but very 

 nearly as long as the next three combined. Oblong, moderately 

 convex, strongly shining and with bright aeneo-cupreous lustre 

 above, the under surface nearly black, with pale epipleura and legs 

 throughout; head fully three-fifths as wide as the prothorax, with 

 eyes moderate in size and prominence, the antennae slender, fusco- 

 testaceous; prothorax one-half wider than long, the subparallel 

 sides almost evenly and moderately arcuate and rather finely re- 

 flexed; apex feebly sinuate, the transverse base finely beaded, with 

 the angles broadly rounded; surface with rather sharply defined 

 anterior transverse impression and very fine stria, the very faint 

 and vague foveae with numerous fine punctures basally; elytra 

 two-fifths longer than wide, barely visibly wider than the prothorax, 

 the apical obliquity straight; striae fine but not so markedly so as in 

 the three preceding, the scutellar rather long, the intervals nearly 

 flat, barely convex on the declivity, the punctulation of the marginal 



