138 MEMOIRS ON THE COLEOPTERA 



the scutellar moderately short, deep, the intervals feebly convex, 

 the series distinct; abdomen with a few very sparse and excessively 

 fine punctules basally only; hind tarsi four-fifths as long as the tibiae, 

 the claws small, strongly arcuate and very slender. Length (9) 

 7.0-7.2 mm.; width 2.7-2.75 mm. Rhode Island and New York 

 (West Point), apparently not common. [Selenophorus gagatinus 

 Dej., S. maurus Hald. and S. viridescens Lee.] gagatinus Dej. 



Color black or piceous, the antennae and tarsi paler, the prothorax and 

 elytra with greenish lustre. Body rather elongate; head smooth, 

 without evident punctuation; prothorax rather convex, about twice 

 as wide as long, the sides evenly arcuate; base and apex equal, the 

 basal angles broadly rounded; surface and basal impressions im- 

 punctate; elytra wider than the prothorax at base, the sides almost 

 parallel, the apices feebly sinuate; striae rather deeply impressed, 

 the intervals feebly convex; abdomen very sparsely punctate; middle 

 tibiae of the male straight, not internally denticulate, the anterior 

 and middle tarsi dilated and biseriately squamulose beneath. Length 

 6.5-7 mm. Texas (Brownsville). [Selenophorus discoderoidcs Schf.l. 



discoderoides Schf. 



Color testaceous above, with the elytra black or blackish 7 



7 Body oblong, convex, smooth and shining, the elytra piceous-black, 

 with paler external margins and with extremely feeble opalescent 

 lustre due to the transverse elongation of the micro-reticulation; 

 under surface piceous, the legs and antennae testaceous; head two- 

 thirds as wide as the prothorax, with rather prominent moderate 

 eyes, the foveae very minute, perforato-punctiform; prothorax 

 shorter than in gagatinus, two-fifths wider than long, the sides 

 broadly rounded, somewhat straighter basally, the apex nearly as in 

 the preceding and evidently narrower than the base, the basal angles 

 obtuse and well rounded; surface rather more depressed latero- 

 basally than in gagatinus and with sparse, extremely minute punc- 

 tulation, becoming rugose in the moderate and very shallow, broadly 

 impressed foveae; stria extremely fine; elytra broader, two-fifths 

 longer than wide and nearly a fourth wider than the prothorax, 

 obtuse at apex, the sinus very feeble though rather evident; striae 

 very fine, the intervals perfectly flat but becoming rather abruptly 

 very narrow and costuliform on the apical declivity; abdomen ex- 

 tremely minutely, sparsely punctulate basally. Length ( 9 ) 6.7 mm. : 

 width 2.7 m'm. Arizona. [Selenophorus concinnus Schf.]. A single 

 example, collected by Morrison, was given another name by the writer 

 and the label marked " type " about thirty years ago, but no de- 

 scription appears to have been published concinnus Schf. 



Body oblong-suboval, less convex, strongly shining, the elytra very 

 polished and black throughout, without evident metallic coloration, 

 the under surface anteriorly testaceous, of the hind body black, the 

 legs and very slender antennae testaceous; head very moderate, only 

 a little more than half as wide as the prothorax, the eyes moderate, 

 the foveae minute and perforato-punctiform; prothorax very nearly 

 one-half wider than long, the parallel sides subevenly and moderately 

 rounded throughout, with the edge finely reflexed; apex as in gaga- 



