166 MEMOIRS ON THE COLEOPTERA 



broadly, evenly arcuate from apex to the parallel basal part; anterior 

 impression obsolete, the posterior broad and shallow but entire, 

 with scattered punctures; stria subentire, broadly and deeply im- 

 pressed, especially toward base: fovese broadly and moderately im- 

 pressed, elongate and well separated from the distinct carina, though 

 the general concavity extends to the latter; elytra three-fifths longer 

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

 arcuate, gradually rounding at the humeri; strise entire, deeply im- 

 pressed throughout and impunctate, feebly and irregularly so lat- 

 erad; side margins well reflexed; foveae simple, very small, before 

 basal third and at three-fifths. Length (cf) 5.5 mm.; width 2.2 



mm. California (Sta. Cruz Mts.) longicornis n. sp. 



Sides of the prothorax broadly and very feebly sinuate posteriorly, not 

 becoming parallel, the angles obtuse but not rounded. Body nar- 

 rower, with relatively larger prothorax, less ventricose, piceous- 

 black to rufo-piceous, rather shining; under surface and legs rufous; 

 head three-fourths to four-fifths as wide as the prothorax, the an- 

 tennae testaceous, the medial joints two and one-half times as long 

 as wide; prothorax a third wider than long, the deeply sinuate apex 

 usually not as wide as the base; sides well reflexed, broadly and rather 

 strongly arcuate, converging in about half; base with a few scattered 

 punctures; anterior impression obsolete, the posterior obsolete medi- 

 ally, the subentire stria rather fine, but becoming broadly and deeply 

 impressed basally; fovese large, broadly and deeply impressed, the 

 deeper part somewhat distant from the distinct carina; elytra oval, 

 three-fifths longer than wide, three-sevenths wider than the pro- 

 thorax, the sides arcuate, gradually rounding basally, the humeri 

 moderately exposed at base; strise entire, rather fine, feebly or very 

 moderately impressed, especially externally, where there is some 

 feeble sparse irregular strial punctulation; foveae near three and four 

 sevenths, sometimes slightly less approximate. Length (cf ) 4.5- 

 4.7 mm.; width 1.7-1.75 mm. British Columbia (Metlakatla), 

 Keen. Two specimens keeni n. sp. 



The species described by Mannerheim under the name Trechus 

 oblonguhis is, because of the extremely finely margined prothorax, 

 evidently allied to crassicornis of the above table, but differs in its 

 rufo-testaceous color and by the thoracic base being somewhat nar- 

 rower than the apex; the elytra, also, are described as deeply 

 punctato-striate, which would not suit crassicornis at all; it is 4 

 by 1.7 mm. in dimensions and occurs in the Island of Sitka. Mr. 

 Hayward makes the name apply to various forms found in Canada, 

 the White Mts., Massachusetts, Ohio and even Mexico, including 

 the species described by Bland as Bemb. wingatei. The latter is 

 piceous, the head dark rufous, smooth and shining, the antennae 

 hairy, rufo-fulvous and more than half as long as the body; pro- 



