STAPHYLINID.E 45 



oval, the eyes ( 9 ) separated by fully two-thirds their length from 

 the nuchal constriction, the antennae ( 9 ) rather thick, evidently 

 incrassate, extending somewhat beyond the middle of the pronotum, 

 a little longer in the male; prothorax a third wider than the head, as 

 long as wide, widest near the base, the sides feebly converging and 

 but slightly arcuate, the three punctures of the series distinct; 

 scutellum very smooth; elytra about as long as the prothorax, at 

 base nearly, at apex quite, as wide as the latter; surface of each with 

 three irregular series of widely separated and moderate punctures, 

 and a postero-external area of closer punctuation, the flanks with 

 numerous punctures; abdomen finely, rather closely, evenly punc- 

 tate, the last ventral (cf ) with a rounded notch, twice as wide as 

 deep, the adjacent surface conically impressed and smooth. Length 

 (cf 9 ) 6.7-8.3 mm.; width 1.35-1.6 mm. New York to Virginia 

 (Newport News) and westward to Iowa (Keokuk). [Q. inversus 

 .Say, bardus Mels. and ater Zieg capucinus Grav. 



Body nearly similar in color, lustre and sculpture, but smaller, the head 

 smaller, more evenly circular, the antennae a little longer, notably 

 more slender, gradually moderately incrassate distally but not so 

 thick as in capucinus; eyes a little larger, separated by half their 

 length from the constriction; puncture between the eyes and con- 

 striction larger and still more foraminiform than in capucinus and 

 situated much nearer to the eye than in that species; prothorax 

 nearly similar but shorter, much wider than long, the anterior 

 series more diverging; elytra rather longer than the prothorax, other- 

 wise nearly as in the preceding, except that the area of punctuation: 

 externally at apex is in great part wanting and the punctures of the 

 flanks very minute and much sparser; abdomen more finely punctu- 

 late; legs and especially the hind tarsi, very much shorter than in the 

 female of capucinus. Length ( 9 ) 5-5 mm.; width 1.2 mm. Nevada 

 (Ormsby Co.), Baker nevadensis n. sp. 



3 Form moderately stout, fusoid, shining, piceous, the head and pro- 

 notum generally black, the elytra with fine testaceous apical margin; 

 head orbicular, the eyes at about three-fourths their length from the 

 nuchal constriction, the antennae moderately long and incrassate, 

 the outer joints about as long as wide; prothorax wider than long, 

 strongly rounded at the sides and base and strongly narrowed an- 

 teriorly; elytra large, rather longer than wide, much longer and, 

 apically, wider than the prothorax, at base sometimes narrower than 

 the latter, especially in the male, the punctures small and sparse, 

 becoming fine and closer laterally, intermingled with slightly 

 larger punctures on the disk; abdomen sometimes feebly iridescent, 

 rather finely, moderately closely punctate; sixth ventral (cf) with a 

 small shallow sinus, the surface thence anteriorly decreasingly but 

 distinctly impressed and smooth; hind tarsi as long as the tibiae or 

 nearly so. Length (cf 9 ) 6.3-8.3 mm.; width 1.6-1.85 mm. Alaska, 

 Queen Charlotte Islands and British Columbia (Metlakatla) to Sta. 

 Cruz, California. Very abundant. [Quedius marginalis Makl.] 



marginalis Makl. 



4 Frontal impressions punctiform and distinctly defined 5 



