STAPHYLINID^E. 105 



with strongly rounded sides, the basal impression minute and subobsolete; 

 elytra moderately short, the suture strongly impressed basally and a third 

 longer than the prothorax, the apices not at all sinuate laterally; abdomen 

 narrower than the elytra, perfectly parallel and straight at the sides, polished, 

 finely and sparsely punctulate; hind tarsi gradually and feebly tapering 

 throughout, the first joint a little longer than the second; middle coxse rather 

 widely separated by the broadly convex depressed ridge, the mesosternal 

 point narrowly truncate, extending to their middle and well separated from 

 the broadly and obtusely angulate metasternal projection. Length 2.6 mm.; 

 width 0.73 mm. Queen Charlotte Islands, Keen. 



Very readily distinguishable by the shining surface and the long, 

 strongly incrassate antennse. The single specimen is rather im- 

 mature and has no distinct sexual marks. 



Dimetrota novella n. sp. Much smaller, rather stout and shining, the 

 sculpture very fine, moderately close, transverse in wavy broken lines on 

 the abdomen; color piceous, the elytra paler but infumate near the scutellum, 

 the head and abdomen blackish, the latter slightly pale basally and at apex, 

 the legs very pale; head wider than long, oval, the eyes very large, convex, 

 at barely half their length from the base, the tempora converging and arcuate; 

 neck slender, about a third as wide as the head, the carinse distinct, entire; 

 antennse long, rather slender, gradually and very moderately incrassate, the 

 second and third joints slender, equal, the outer slightly wider than long, the 

 last rapidly pointed at tip, longer than the two preceding; prothorax moder- 

 ately transverse, much wider than the head and evidently narrower than the 

 elytra, parallel, with evenly and moderately arcuate sides, the median line very 

 finely impressed, more strongly basally; elytra moderately short, with feebly 

 diverging sides, the suture narrowly impressed at base, a third longer than 

 the prothorax, the apices not sinuate; abdomen broad, slightly narrower 

 than the elytra, parallel, with feebly arcuate sides, very slightly more narrowed 

 apically, the first five tergites equal, finely, rather closely punctate, sparsely 

 toward tip, polished; basal joint of the hind tarsi shorter than the second. 

 Length 2.1 mm.; width 0.58 mm. New York (Willets Point, Long Island). 



This species is evidently aberrant and not a true Dimetrota,, 

 though the hypomera are similarly horizontal and warped, a small 

 portion only being visible laterally. 



Dimetrota sentiens n. sp. More parallel, slightly convex and shining, 

 the sculpture nearly as in the preceding, the type evidently immature, pale 

 piceous throughout; head much larger, wider than long, the eyes and tempora 

 similar, the carinae distinct, entire; antennse very long, extending to the tips 

 of the elytra, gradually and very moderately incrassate distally, the third 

 joint a little longer than the second, both very elongate, the remaining joints 

 to the seventh more or less evidently longer than wide, eight to ten almost as 

 long as wide, the last as in the preceding though barely longer than the two 

 preceding; prothorax larger, similar in form though more convex, distinctly 

 wider than the head and barely perceptibly narrower than the elytra, the 



