204 Memoirs on the Coleoptera 



notably prominent eyes and feebly concave anterior impressions, the 

 labrum rather more symmetrically incised than usual; mandibles 

 small (cf ), larger (9 ); antennae not as long as the head and prothorax, 

 piceous, blacker basally; last palpal joint slender, cylindric, slightly 

 shorter than the third, rather more distinctly shorter in the female; 

 prothorax one-half wider than long to somewhat more; base much 

 wider than the apex, transverse medially, feebly oblique thence to the 

 slightly obtuse but sharp angles; sides broadly, subevenly rounded, 

 scarcely straighter basally, very finely reflexed; anterior impression 

 barely traceable, the posterior wholly obsolete, the median stria fine 

 but rather deep, almost entire; foveae deep, linear, extended to the 

 basal margin by shallower impression; elytra oblong, parallel, obtusely 

 ogivally rounded at tip, one-half longer than wide, fully two-fifths wider 

 than the prothorax, the sides more rounding basally to the thoracic 

 angles; striae rather deep, sharply defined, very obsoletely micro-punctu- 

 late at the bottom, the seventh about as distinct as the others; intervals 

 obviously convex (c?'), virtually fiat (9), the puncture a little behind 

 the middle as in/oz'eato. Length (9 ) 13.5 mm.; width 5.2 mm. Canada 

 (Montreal). 



This species resembles laticollis somewhat but is smaller, with 

 relatively narrower, basally somewhat narrowed prothorax, slightly 

 longer third palpal joint and distinct seventh elytral stria; it is 

 much smaller and narrower than foveata, besides differing in several 

 other structural characters. In size and general characters it 

 resembles impressicollis Dej., but differs apparently in its obsolete 

 transverse pronotal impressions and still more indistinct strial punc- 

 tures of the elytra, with more convex intervals. 



Diplocheila parallela n. sp. — Parallel, rather more convex and with 

 more polished lustre than in the other species, deep black, the legs black; 

 head more rounded, four-sevenths as wide as the prothorax, the eyes 

 moderate and only very moderately convex; anterior impressions very 

 small and feeble; labrum symmetric, moderately emarginate; mandibles 

 unusually small; fourth palpal joint truncate at tip, barely shorter than 

 the third; antennae black, slender, nearly as long as the head and pro- 

 thorax, the latter not quite one-half wider than long, the sides evenly 

 arcuate from apex to the obtuse and narrowly rounded basal angles, 

 very finely, equally reflexed; base distinctly wider than the somewhat 

 deeply sinuate apex; the apical angles broadly rounded, the transverse 

 impressions both obsolete, the stria fine; foveae linear, deep, extending 

 almost to the basal margin; elytra three-fifths longer than wide, only a 

 fourth or fifth wider than the prothorax, oblong, evenly rounded at 

 apex, the sides narrowly reflexed, only a little more arcuate basally, the 

 sinuate basal margin extending from the first stria to the acute humeral 

 angulation; striae moderate, rather deep and sharply defined, virtually 

 smooth, the sixth feeble, the seventh, almost completely obsolete; 

 sutural stria a very short oblique fine line; intervals flat externally, 



