STAPHYLINID.E. 91 



subeven circular converging arc to the base and as long as the eyes, the 

 carinre fine, strong but not entire; antennae rather long, thick, gradually 

 strongly incrassate, black, scarcely paler basally, the third joint as long and 

 thick as the second but strongly and evenly obconic, the fourth nearly 

 as long as as wide, the outer joints fully one-half wider than long, the 

 last obtuse, as long as the two preceding; prothorax barely two-fifths 

 wider than long, parallel, with subevenly and moderately rounded sides 

 and rounded base, not impressed; elytra feebly transverse, at base fully 

 a fifth, at apex more than two-fifths, wider, the suture a third longer, than 

 the prothorax; abdomen slightly narrower than the elytra, with feebly 

 arcuate sides, only just visibly narrowed apically, the fifth tergite shorter 

 than the fourth; middle coxae well separated, the mesosternal process less 

 acute than in the preceding and separated from the shorter and broader 

 metasternal angle by a much longer interval. Length 2.3 mm.; width 

 0.72 mm. British Columbia (Metlakatla), Keen. 



Differs from postulans in the more orbicular head, larger third and 

 longer fourth antennal joints, relatively smaller prothorax, much 

 sparser punctures, shorter fifth tergite and different intermesocoxal 

 structure. Sexual characters are not clearly determinable in my 

 two examples. 



The two following species have, like brumal/Is and carlotta, re- 

 markably developed elytra and sexually different antennae, and 

 the small group is peculiar in all probability to the northern Pacific 

 coast fauna: 



Atheta wrangelica n. sp. Nearly similar in form, coloration and sculp- 

 ture to brumalis Csy., the asperate punctures closer throughout, finer 

 and much less close on the abdomen, which is finely strigilate in close-set 

 transverse wavy lines, the pubescence nearly similar; head slightly trans- 

 verse, rather more than three-fourths as wide as the prothorax, the eyes 

 moderately large, at fully two-thirds of their own length from the base, 

 the tempora less prominent, forming an even rounded converging arc 

 behind them to the base, the carinae very feeble and far from entire; an- 

 tennae ( 9 ) better developed than in brumalis, rather long, very moderately 

 incrassate, the third joint longer than the second, fourth distinctly 

 longer, the tenth but slightly shorter, than wide; prothorax nearly as in 

 brumalis but with the parallel sides subevenly and very moderately ar- 

 cuate throughout the length, the surface with a very small and feeble 

 rounded impression just before the scutellum; elytra almost as long as 

 wide, at base nearly two-fifths, at apex almost one-half, wider, the suture 

 one-half longer, than the prothorax; abdomen parallel, with nearly 

 straight sides, narrower than the elytra, the fourth and fifth tergites 

 equal; hind tarsi slender, with very long stiff setae, the basal joint a 

 little shorter than the second. Length 2.4 mm. ; width 0.74 mm. Alaska 

 (Fort Wrangel), Wickham. 



The single female of this species now at hand represents a species 



