Casey — Observations on the Staphylinidae. 175 



tip extremely narrowly rounded. Length 8.5-4.0 mm. ; width 0.8-0.85 

 mm. California (San Diego) arenaria Csy. 



Second antennal joint much ionger than the third; elytra bright testaceous 

 except broadly along the sides and base; vestiture fulvous, rather 

 abundant and conspicuous 4 



4 — Form very broad, parallel, dull as usual, the abdomen shining, black, 

 the legs piceous, the antennae black, scarcely paler toward base; head 

 relatively smaller than in arenaria, somewhat wider than long, two- 

 thirds as wide as the prothorax, finely, rather feebly and not closely 

 punctate, with the parallel median line impunctate; antennae nearly as 

 long as the bead and prothorax, stout throughout, though only moder- 

 ately incrassate distally; prothorax about a fourth wider than long, 

 parallel and rounded at the sides, the base broadly arcuate, the punc- 

 tures fine and rather close, the surface subveven, convex, with the two 

 widely separated basal tumidities feeble ; elytra large, distinctly longer 

 and wider than the prothorax, slightly transverse, the suture as long as 

 the median line, the surface flat, finely but distinctly, unusually closely 

 punctured; abdomen broad, nearly as wide as the elytra, parallel, 

 punctured finely and sparsely except at the bases of the tergites as 

 usual; mesosternal process narrow, short, becoming parallel toward 

 tip, the latter arcuato- truncate. Length 3.6 mm.; width 1.1 mm. 

 California (Redondo) ,— H. C. Fall qaadrifer n. sp. 



Form narrow, parallel, depressed as usual, dull, the abdomen moderately 

 shining, black, the legs piceous, the antennae black, slightly picescent 

 toward base; head nearly as long as wide, three-fourths as wide as the 

 prothorax, finely, feebly punctured in the usual way, the antennae 

 moderately stout and incrassate distally; prothorax smaller, parallel, 

 about a fifth wider than long, the sides and base rounded, the punctures 

 feebly impressed, somewhat close-set, the basal tumid spots distinct ; 

 elytra very much wider and longer than the prothorax, the suture 

 slightly longer than the median line, the punctures rather fine but some- 

 what less close- set than in quadrifer; abdomen evidently narrower than 

 the elytra, parallel, finely, rather sparsely punctured as usual ; meso- 

 sternal process short, still somewhat broader than in quadrifer and more 

 gradually narrowed to the arcuato -truncate apex. Length 3.6 mm.; 

 width 0.78 mm. California (Alameda) trilimbata n. sp. 



The European algarum, of Fauvel, belongs to this genus, 

 although the mesosternal process is evidently longer than in 

 any of the American species and still somewhat wider than in 

 trilimbata, gradually becoming parallel toward the abruptly 

 arcuato-truncate apex near apical fourth of the acetabula; 

 the second antennal joint is longer than the third and the 

 basal joint of the hind tarsi very short as usual, and there is 

 the usual depressed discontinuity between the tips of the 

 meso- and metasternal processes. The species described by 



