52 MEMOIRS ON THE COLEOPTERA 



much narrower than an elytron, the sulci similar; antennae fuscous, 

 gradually obscure rufous basally, shorter than in concolor though 

 about three-fourths as long as the elytra, the medial joints equal 

 to the subapical and twice as long as wide; prothorax three-fifths 

 wider than long, relatively wider basally, the base wider than the 

 apex and but little less than the maximum width; sides broadly 

 arcuate, becoming parallel in about basal fourth, the angles right 

 and sharp; surface nearly similar but with more rugulosity in the 

 latero-basal region, the foveae deep, more oval, the carina moder- 

 ate; elytra less than one-half longer than wide, nearly two-fifths 

 wider than the prothorax, parallel, with more rapidly rounded hu- 

 meri, parabolic in apical two-fifths, the punctures and strife nearly as 

 in concolor, very much less coarse than in inopinum, the first, second 

 and fifth deep at apex as in concolor. Length (9 ) 3.7 mm.; width 

 1.45 mm. New York (Bluff Point, Lake Champlain). 



consessor n. sp. 



10 Striae distinctly impressed and with close-set punctures n 



Striae barely at all impressed and with well separated punctures, as in 

 quadrulum 12 



II Larger species, depressed, nigro-aeneous, shining; prothorax quad- 

 rate, slightly shorter than wide, the sides rounded anteriorly, almost 

 parallel behind, the hind angles right, finely carinate; stria fine; 

 transverse impressions deep, the foveae " bistriate" [the meaning of 

 this expression is not clear] and sparsely punctate; elytra elongate- 

 oval, emarginate at base, the striae closely punctate, the third bi- 

 punctate. Length 4.7 mm. New Mexico. Mr. Ulke. recticolle Lee. 



Smaller species, moderately convex, polished, deep black, without metallic 

 lustre, the legs black; head nearly four-fifths as wide as the prothorax, 

 much narrower than an elytron; antennae black, slender, the joints 

 between two arid three times as long as wide; prothorax not quite a 

 third wider than long, the sides broadly and feebly arcuate submedi- 

 ally, feebly and equally oblique and nearly straight anteriorly and 

 posteriorly, becoming broadly, feebly sinuate in about basal fourth, 

 the angles right and sharp; surface with fine incomplete stria, obso- 

 lete anterior and distinct posterior transverse impression, the mar- 

 gins moderately reflexed; foveae punctate, rather large, moderately 

 deep and sublinear, the carina fine and feeble; elytra three-fifths 

 longer than wide and one-half wider than the prothorax, parallel, 

 with feebly arcuate sides, broadly rounding at the humeri, obtusely 

 ogival in apical third; striae rather deeply impressed to the apex, 

 the punctures strong, moderately coarse and very close-set, gradu- 

 ally disappearing toward apex, the foveae at two-fifths and three- 

 fourths. Length (9 ) 3.85 mm.; width 1.45 mm. Nevada. 



oblatum n. sp. 



12 Strial punctures very fine and feeble. Body rather slender, elongate- 

 suboval, very moderately convex, shining and deep black through- 

 out, the legs black; head fully three-fourths as wide as the prothorax 

 and as wide as an elytron to slightly less; palpi black; antennae 

 black, slender, three-fourths as long as the elytra, the medial joints 

 very nearly three times as long as wide; prothorax a fourth to third 



