Wikipedia
Oxytelinae
The Oxytelinae are a subfamily of the Staphylinidae, rove beetles. They have a unique pair of defensive glands opening onto the ninth tergum. Most have seven complete sterna visible. The tarsal patterns are 2-2-2, 3-3-3, 4-4-4, or 5-5-5. They are generally found in moist places: moss along streams, leaf litter, beaches, etc. The 17 genera in North America contain 262 species.
Image: Carpelimus sp 150993 dorsal.tif|Carpelimus sp. Image: Oxytelus sp 0190532 dorsal.tif|Oxytelus sp. Image: Bledius mandibularis 0157239 dorsal.tif| Bledius mandibularis Anotylus - 2012-10-16.webm|Anotylus cf. inustus