American Caraboidea 201 



blackish basally, extending well behind the thoracic base; prothorax 

 longer than usual, scarcely more than a third wider than long; sides 

 finely reflexed, gradually rounding anteriorly, straight and just visibly 

 converging in about basal half; base broadly sinuate medially, much 

 wider than the apex; apical angles narrowly rounded, the basal slightly 

 more than right, sharply defined, not blunt; anterior impression visible 

 as a large foveiform depression on the median line, the posterior very 

 feeble, the median stria fine, broadly impressed, greatly biabbreviated; 

 fovese slightly elongate, distant from the base, broadly impressed, lying 

 within outer fourth; surface with some remote rugulae; scutellum 

 equilatero-triangular, with straight sides; elytra oblong, with parallel 

 and broadly arcuate sides and obtusely rounded apex, the apices oblique 

 and straight, not sinuate, one-half longer than wide, two-fifths wider 

 than the prothorax; striae incised, feebly subpunctulate, finer and feebler 

 externally, the seventh subobsolete, the scutellar stria obsolete, the 

 puncture small but distinct. Length (9) 18.5 mm.; width 7.65 mm. 

 Lake Superior. 



Belongs in the neighborhood of expansa and major, difTering 

 from the former in the stronger anterior cephalic foveae but less 

 pronounced large anterior depression, in which the fovese are 

 individually undefined in expansa, also in the narrower and much 

 less transverse prothorax and much narrower general form of the 

 body. From major it differs in the more obsolete seventh eiytral 

 stria, narrower and more elongate prothorax and rather more 

 unequal and more setose lobes of the labrum, also in the relatively 

 larger head and slightly narrower bodily form. 



Diplocheila foveata n. sp. — Dilated and rather convex, the lustre as 

 •in others of the genus, deep black; head three-fifths as wide as the pro- 

 thorax, with moderate but prominent eyes, feeble and indefinite anterior 

 impressions and deep epistomal line; labrum acutely and deeply, angu- 

 larly emarginate, the left lobe sharply triangular, much broader than the 

 right lobe and just visibly shorter; antennae slender, fuscous, the first 

 three joints black; last palpal joint elongate-oval, evidently shorter 

 than the third; right mandible sinuato-truncate; prothorax one-half 

 wider than long; base nearly as in the preceding, much wider than the 

 apex; sides broadly, evenly arcuate, gradually becoming straight and 

 parallel basally, the basal angles right, not rounded; transverse impres- 

 sions subobsolete, the foveae very short, deep, almost punctiform, at the 

 bottom of a large shallow depression; stria fine; elytra rather short and 

 broad, not quite one-half longer than wide, about a third wider than 

 the prothorax, the sides rounding at base to the thoracic angles; striae 

 moderate, finely subpunctate laterally, the seventh rather deep but 

 more broadly impressed than the others; intervals scarcely more than 

 flat, the alternate ones somewhat elevated medially toward tip, the 

 scutellar obsolete. Length (9) 14.5 mm.; width 6.0 mm. New York 

 (Lake Champlain). 



