42 MEMOIRS ON THE COLEOPTERA 



* 

 long neck and moderate, very prominent eyes, the sulci rather broad 



and shallow; antennae piceous, the basal joint rufous, very long and 

 slender, fully as long as the elytra, the medial joints between three and 

 four times as long as wide; prothorax barely visibly wider than long, 

 much narrower at base than apex; base distinctly shorter than the 

 length; sides broadly arcuate, becoming rapidly sinuate behind and 

 parallel in basal fourth, the angles right and sharp, the apex feebly 

 sinuate, with blunt angles; surface smooth, the stria fine, extending 

 from base to the distinct and sharp subapical impression, the basal 

 impression wholly obsolete medially; foveae large, obliquely elongate 

 and deep, beyond lateral fourth, only feebly rugulose, the carina 

 rather long and distinct; margins strongly but not very broadly re- 

 flexed; elytra two-thirds longer than wide and almost twice as wide 

 as the prothorax, feebly subinflated posteriorly and evenly rounded 

 behind in about two-fifths; sides feebly arcuate, the rounded hu- 

 meri widely exposed at base: striae entire, fine, feebly impressed, be- 

 coming subobsolete externally, the seventh obsolete; foveae rather 

 strong, at three-sevenths and near four-fifths; tarsi very long and slen- 

 der. Length (9 ) 5.3 mm.; width 2.0 mm. California (Hydesville, 

 Eel River Valley, Humboldt Co.). One example. . . . electum n. sp. 

 Form narrow, elongate, strongly depressed above, shining, piceous-black, 

 the elytra and epipleura rather pale castaneous; under surface black, 

 the legs long and very slender, pale piceous, the base and tip of the 

 femora testaceous; head but just visibly narrower than the prothorax, 

 with moderate though prominent eyes, the sulci deep, shining; an- 

 tennae long and very slender, piceous-black, the basal joint paler, 

 fully as long as the elytra, the medial joints fully four times as long 

 as wide; prothorax less than a fifth wider than long; base distinctly 

 narrower than the apex, the sides evenly, strongly rounded, rapidly 

 converging behind the middle and sinuate, becoming parallel in 

 more than basal fourth, the angles slightly obtuse because of the 

 lateral obliquity of the base, but not blunt; apex broadly sinuate, 

 with slightly blunt angles; surface with strong anterior impression, 

 the posterior obsolete, the stria deep and strong, biabbreviated; 

 margins moderately reflexed; foveae moderate, only slightly rugu- 

 lose, very deep, sublinear, far outside of lateral fourth and unusually 

 near the slender feeble carina; elytra about twice as long as wide, 

 not quite one-half wider than the prothorax, gradually parabolic in 

 about apical third, subparallel, with very feebly arcuate sides, the 

 margin incurved at base to the fifth stria, which becomes very deep 

 in apical sixth; striae smooth, deeply impressed internally, becoming 

 feeble externally, the seventh very faint; intervals convex suturally; 

 foveae just before the middle and behind apical fifth. Length (9 ) 

 5.3 mm.; width 1.8 mm. California (Soda Springs, Anderson Val- 

 ley, Mendocino Co.) extensum n. sp. 



My identification of planatum Lee., rests upon the authority of 

 Mr. Hayward, who made actual comparisons of the Lake Superior 

 and British Columbia representatives; the forms inhabiting the 



