38 MEMOIRS ON THE COLEOPTERA 



ished, greenish-black anteriorly, the elytra less shining and faintly 

 greenish; under surface and legs black; head five-sixths as wide as 

 the prothorax, the sulci broad, not very deep; antennae long and very 

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

 about four times as long as wide; prothorax a third wider than long, 

 the sides broadly, evenly arcuate, rather abruptly sinuate basally, 

 moderately broadly, strongly reflexed; surface with crease-like lines 

 and strong subapical but obsolete subbasal impression, the stria be- 

 tween the two moderate; basal foveae large, shallow, rugose, deeply 

 linearly and obliquely impressed beyond lateral fourth, the carina 

 long but only moderately strong; elytra large, three-fifths longer 

 than wide, three-fourths wider than the prothorax, gradually para- 

 bolic in fully apical third, the striae fine, feebly impressed, the outer 

 ones distinct, though still feebler, the intervals just visibly convex; 

 foveae at three-sevenths and four-fifths, deep; apical part of the fifth 

 stria a long and conspicuous groove. Length (9 ) 7.0 mm.; width 

 2.7 mm. California (near San Francisco), Dunn., .solutum n. sp. 



Prothorax moderately oblique and broadly, very feebly sinuate at the 

 sides in about basal half, the angles sharp as in the preceding, though 

 evidently more than right 3 



3 Pronotum broadly and strongly reflexed at the sides, the body broadly 

 oblong, black, the anterior parts polished and with feeble viridi- 

 aeneous lustre, the elytra dull bronzy-black, the under surface and 

 legs black; head five-sixths as wide as the prothorax, it and the an- 

 tennae nearly as in sohitum, the medial joints, however, rather less 

 than four times as long as wide; prothorax barely a fourth wider 

 than long, the surface throughout nearly as in the preceding, except 

 that the transverse basal impression is rather deep and distinct; 

 elytra not quite three-fifths longer than wide and four-fifths wider 

 than the prothorax, flat above, the striae fine and scarcely at all 

 impressed, the seventh about as distinct as the sixth; foveae very 

 moderate, at three-sevenths and four-fifths. Length (9) 7-7 mm.; 

 width 2.8 mm. British Columbia. Lake Superior, LeConte. 



planatum Lee. 



Pronotum much more narrowly but strongly reflexed at the sides; upper 

 surface shining and blackish-green throughout, the elytra slightly 

 less shining; under surface and legs black; head four-fifths as wide 

 as the prothorax, nearly as in the two preceding, the very slender 

 antennae with the medial joints four times as long as wide; prothorax 

 slightly more than a fourth wider than long; surface throughout 

 nearly as in solutum, the transverse subbasal impression feeble, 

 obsolete at the middle; elytra one-half longer than wide and three- 

 fourths wider than the prothorax, ogival in nearly apical two-fifths: 

 striae fine, slightly impressed and with feebly convex intervals, the 

 seventh stria feeble, sometimes only just observable in the male; 

 strial punctulation stronger and more distinct than in either of the 

 two preceding; foveae rather strong, at three-sevenths and four- 

 fifths, the very deep apical groove of the fifth stria as in the two pre- 

 ceding. Length (i 9 , 7 d") 6.2-7.0 mm.; width 2.3-2.5 mm. Cal- 



