26 MEMOIRS ON THE COLEOPTERA 



where distinct, entire, the large foveae near two-fifths and three- 

 fourths, mutually as distant as the anterior is from the base. Length 

 (c?) 5-3 mm.; width 2.0 mm. California (Placer Co.), Koebele. 



adumbratum n. sp. 



17 Striae more impressed toward the suture; head never wider and al- 

 most always narrower than the thoracic apex; eyes very moderate 



in size and prominence 1 8 



Striae extremely fine, equal throughout the width, not more distinct 

 suturally; head wider than the thoracic apex, the eyes larger and 



more prominent 39 



1 8 Elytra feebly opalescent in lustre; prothorax never more than mod- 

 erately transverse, the habitus very much as in Trechus 19 



Elytra never opalescent; prothorax generally but not always shorter and 

 more transverse, the hind body relatively more inflated as a rule. 27 

 19 Legs dark, rufo-piceous in color. Body elongate-oval, moderately 

 convex, rather shining, black above and beneath, the elytra only 

 very faintly picescent and with barely perceptible opalescence; head 

 moderate, scarcely three-fourths as wide as the prothorax, the sulci 

 rather broadly but deeply impressed; palpi and antennae black or 

 nearly so, the basal joint of the latter, which are very slender and 

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

 slightly more than three times as long as wide; prothorax a fourth 

 wider than long, the sides broadly inflated and arcuate, becoming 

 nearly parallel in about basal fourth; margins distinctly reflexed; 

 base much wider than the apex; surface laterally at base finely 

 rugose almost to the middle; at some distance from the long strong 

 carina there is a large shallow diffuse impression; elytra about one- 

 half longer than wide, three-sevenths wider than the prothorax, 

 evenly oval, with the sides evenly arcuate, more so apically, widest 

 at the middle; striae fine, impressed inwardly, easily traceable to 

 the sides, entire, the foveae strong, just before the middle and near 

 apical third. Length (c?) 4.2-4.6 mm.; width 1.7-1.9 mm. Brit- 

 ish Columbia (Inverness),- Keen funereum Lee. 



Legs pale yellowish-testaceous throughout 20 



20 Larger species, about 5 mm. in length 21 



Smaller, always distinctly less than 5 mm. in length 22 



21 Form elongate-oval, moderately convex and shining, the elytra evi- 

 dently opalescent, nearly black, the abdomen piceous; head rather 

 small, thre'e-fourths as wide as the prothorax but much narrower 

 than an elytron, the sulci rather wide but deep, the orbital puncture 

 somewhat distant from the eye; antennae long and very slender, 

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

 times as long as wide; prothorax a fourth wider than long, widest 

 before the middle, where the sides are well rounded, straighter api- 

 cally to the obtuse and rounded angles, oblique basally, becoming 

 sinuate only very near the angles, which are right; sides rather 

 widely and strongly reflexed ; base finely, sparsely punctulate, the 

 foveae very deep, at lateral fourth, the carina long and strong; elytra 

 nearly one-half wider than the prothorax, oval, fully one-half longer 

 than wide, the arcuate sides merging gradually into the strong apical 



