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Two-hundred and nine taxa (171 identified to species level), in 111 genera, of staphylinid beetles were documented during a 21-year field survey of a national park site (George Washington Memorial Parkway) that spans parts of Fairfax and Arlington counties in Virginia. Fifty-two species, plus five additional genera, documented from the Parkway are first records for Virginia. An additional 62 species new to Virginia are listed in the appendix from broader research documenting 792 species of Staphylinidae from Virginia, Maryland, and the District of Columbia. The study also increases the number of staphylinid species known from the Potomac River Gorge to 167. Of the seven capture methods used in the survey, Malaise traps were the most successful. Periods of adult activity, based on dates of capture, are given for each species. Relative abundance is noted for each species based on the number of captures. Notes on morphological characteristics and habitats are given for some species. Thirteen species adventive to North America are documented from the Parkway and 60 adventive species are recorded from Virginia, Maryland, and the District of Columbia in the Appendix. Range extensions are documented for 16 species. Images of 11 species new to Virginia are provided. [ABSTRACT FROM AUTHOR]

The beetle (Insecta: Coleoptera) fauna associated with the underground burrow systems of the plains pocket gopher, Geomys bursarius (Shaw) (Mammalia: Rodentia: Geomyidae), is reported from one of Indiana's primary conservation zones, Kankakee Sands, for the first time. Pitfall traps baited with pig dung were placed into active burrow systems and routinely checked from February 2014 to January 2015. A total of 26 species of Coleoptera were found in the burrow systems. We summarize phenological data for the most commonly collected species. Also, a complete checklist of burrow-inhabiting beetles is provided. [ABSTRACT FROM AUTHOR]