rove beetle

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of numerous beetles of the family Staphylinidae, often found in decaying matter and having slender bodies and short wing covers.

from The Century Dictionary.

• noun A brachelytrous coleopterous insect of the family Staphylinidæ, especially one of the larger species, such as the devil's coach-horse.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Any of various carnivorous or scavenging beetles of the family Staphylinidae that are often found in decaying matter and have slender bodies and short wing covers.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun active beetle typically having predatory or scavenging habits