166 Trans. Acad. Sci. of St. Louis. 



and close-set, the upper part of the flanks broadly Impunctate except at 

 the middle; abdomen subequal in width to the elytra, parallel, some- 

 what finely and closely punctured, more coarsely in the impressions, a 

 rather wide median line on segments two to five impunctate except at 

 ba?e; vestiture throughout coarse but sparse and not very conspicuous. 

 Length 5.0 mm.; width 1.35 mm. California (Monterey Bay). 



tibialis n. sp. 



Form only moderately stout, parallel, the prothorax but slightly wider than 

 long; integuments shining, the pronotum with minute and indistinct 

 punctulation as usual 3 



B — Body black, the legs and antennae dark piceo-rufous, the elytra very 

 faintly picesceut; head rather smaller than in the preceding, barely 

 half as wide as the prothorax, having similar very c«arse punctures ag- 

 gregated in a transverse, medially interrupted line near the base, with 

 one or two at each side of the middle anteriorly, the antennae nearly 

 similar; prothorax barely a fourth wider than long, the sides distinctly 

 converging from base to apex but only very feebly arcuate, the punc- 

 tures coarse and closely aggregated in the deep narrow sulci, the 

 surface generally also having a sparsely placed series near the side 

 margins, two or three iu the middle at lateral fifth and a cluster of three 

 or four at lateral fourth near the base; elytra at the sides only slightly, 

 though distinctly, longer than the sides of the prothorax, the suture 

 three-fourths as long as the median line, the punctures very coarse and 

 close-set, rugose as usual, the upper part of the flanks with a small 

 impunctate spot posteriorly; abdomen punctured nearly as in tibialis, 

 the median smooth line generally less wide and frequently feebly de- 

 flned ; pubescence throughout coarse but sparse, rather pale but not 

 very conspicuous. Length 3.0-4.6 mm.; width 0.8-1.0 mm. California 

 (San Francisco) to Alaska. l=Aleochara stdc, Mann.]. 



snicicollis Maun. 



Body deep black throughout, the elytra not paler, the legs rufo-piceous; 

 head nearly as in sulcicollis, barely half as wide as the prothorax, the 

 latter more rounded at the sides and even less transverse, about a flfth 

 wider than long, the sides only slightly converging from base to apex 

 and conspicuously arcuate, the punctures similar but more numerous and 

 more confused toward the sides; elytra well developed, barely a third 

 wider than long. the sides distinctly lonirer than the sides of the prothorax, 

 the suture fully four-fifths as long as the median line, the punctures 

 coarse, very dense, rugose, the upper part of the flanks impunctate in 

 apical half; abdomen not quite as wide as the elytra, parallel, rather 

 flnely but strongly and very closely punctured, nearly as in the pre- 

 ceding species but more closely and with a very narrow, abruptly de- 

 fined median impunctate line; pubescence very coarse, unusually long, 

 moderately close, fulvous and conspicuous. Length 4. 0-4. 4mm. ; width 

 0.95 mm. Queen Charlotte Island (Massett.), — J. H. Keen. 



rugosa n. sp. 



4 — Moderately stout, convex, shining, deep black, the elytra not paler, the 

 legs and antennae pale brownish-red ; head well developed, fully as long 

 as wMe, rather more than half as wide as the prothorax, the latter, as 

 well as the head, punctured nearly as in snlcicollis but with the very 



