240 MEMOIRS ON THE COLEOPTERA 



2.9 mm. Lake Superior (White-Fish Point), Schwarz. [Amara 

 schwarzi Hayw.] septentrionalis Lee. 



Body more or less stout in form 3 



3 Larger species, always well over 8 mm. in length, with a definite 

 though obtuse carina at the thoracic angles 4 



Smaller species, under 8 mm. in length, without an external basal tho- 

 racic carina 5 



4 Form oblong-suboval, convex, polished black above and beneath; 

 legs black, the femora obscure rufous; elytra of the female not dis- 

 tinctly less shining; head three-fifths as wide as the prothorax, or 

 less (9); eyes prominent, the strides small, fine, antennae ferrugin- 

 ous, much shorter than the head and prothorax, the latter two- 

 fifths (cf) to one-half (9) wider than long, the apex rather deeply 

 sinuate, with prominent blunt angles, much narrower than the 

 base, which is slightly arcuate at each side, the sides narrowly but 

 strongly, evenly reflexed, evenly arcuate from apex to the basal 

 angles, which are minutely prominent; impressions nearly obsolete; 

 surface sparsely punctulate medio-basally, the foveae linear, widely 

 separated, having scattered moderate punctures; median stria much 

 abbreviated at apex; elytra one-half longer than wide and slightly 

 though evidently wider than the prothorax, gradually ogival in 

 apical two-fifths; striae rather strong though very moderately im- 

 pressed and distinctly, though not coarsely, punctured, the scutellar 

 oblique, moderate; lateral series very widely interrupted; intervals 

 but just visibly convex, not more so at apex. Length (cf 9 ) 8.4- 

 10.5 mm.; width 3.4-4.4 mm. New York (Lake Champlain) to 

 Illinois (Highland Park) and Lake Superior (Marquette and Duluth). 

 Abundant. [B. l&vistriatiis Putz.; also liber and oregonus Lee.] 



latior Kirby 



Form and general habitus nearly as in latior but not quite so elongate and 

 less deep black, the elytra faintly picescent, the under surface and 

 legs throughout somewhat obscure rufous, the former sometimes 

 blackish-piceous, similarly shining in both sexes and convex; head 

 not quite so large, less than three-fifths as wide as the prothorax, 

 otherwise nearly as in latior, the antennae similar; prothorax shorter, 

 fully one-half wider than long in both sexes, otherwise very nearly 

 as in latior, except that the foveae are more shallow; basal punctu- 

 ation similarly variable in amount; elytra one-half longer than wide, 

 still more evidently wider than the prothorax, rather more rapidly 

 and obtusely ogival behind, the sculpture subsimilar. Length (cf 9 ) 

 9.0-9.4 mm.; width 3.8-4.1 mm. Arizona (Humphreys Peak). 

 Four examples. Named in honor of Andrew A. Humphreys, U. S. 

 Engineers humphreysi n. sp. 



Form and habitus nearly as in the preceding, oblong, stout, convex, 

 black, less shining, the abdominal segments rufescent at apex; legs 

 obscure rufous; head larger than in the preceding, though scarcely 

 three-fifths as wide as the prothorax, the eyes moderate, prominent; 

 antennae ( 9 ) ferruginous, extending to about basal third of the 

 prothorax, which is as in humphreysi, except that the reflexed lateral 

 margins are feebly rufescent and the anterior angles still more broadly 



