Atheta (Microdota) pennsylvanica Bernhauer, 1907

Klimaszewski, Jan, Chandler, Donald S., Davies, Anthony & Bourdon, Caroline, 2023, Aleocharine rove beetles of New Hampshire, USA: new taxa and new records (Coleoptera, Staphylinidae, Aleocharinae), Zootaxa 5364 (1), pp. 1-141 : 35

58. Atheta (Microdota) pennsylvanica Bernhauer

(Illustrations in Klimaszewski et al. 2018), Table 1

References. Bernhauer 1907. Blatchley 1910. Casey 1910. Gusarov 2003. Majka and Klimaszewski 2008. Bishop et al. 2009. Klimaszewski et al. 2011, 2015c, 2018.

Distribution. Nearctic. Canada: LB, MB, NB, NF, NS, ON, QC. USA: IN, MA, ME (NSR), MN, NH (NSR), NY, PA, RI, VA, VT.

Collection and Habitat data. In NH adults were found in coniferous and hardwood leaf litters, from rotten wood, and from leaf litters adjacent to wet areas such as streams, springs, and swamps. Taken by flight intercept and window traps. Adults were collected from April to October in NH. In Canada also found in various coniferous and deciduous forests. Adults are often abundant in various kinds of decaying and fresh mushrooms (gilled, polypore, Polyporus varius on side of log, stalked polypores) on forest floor, and also occurring in forest litter, especially in the spring; often captured in abundance by pitfall traps ( Klimaszewski et al. 2018).

Material. USA, Maine, York Co.: West Lebanon, 19–25.VI.1990, D.W. Barry, FIT, 1 female. New Hampshire, Carroll Co.: 2 mi NW Jackson, 11.IX.1981, D.S. Chandler, berlese forest litter, 1 female. 6 mi NW Bartlett, Nancy Brook Trail, 1500’, 9.IX.1987, A. Davies, sifting Fagus litter beside logs ( CNC), 6 sex? 5 mi W Bartlett Sawyer Pond Trail, 1800’, 11.IX.1987, A. Davies, frass and litter in Betula , Acer treeholes ( CNC), 5 sex? Cheshire Co.: Pisgah St. Forest, Pisgah Valley For., 1080’, 20.VII.1990, R.M. Reeves, sift hemlock litter, 1 male. Rhododendron St. Pk., 22.IV.1982, D.S. Chandler, sift leaf litter along stream, 1 sex?; sift Rhododendron litter, 3 females. Coos Co.: Mt. Washington, Auto Road, 3000’, 1.VII.1982, D.S. Chandler, sift litter by spring, 4 sex?; 25.VI.1982, D.S. Chandler, sift litter by stream, 2 sex? Mt. Washington, Auto Road, 2700’, 1.VII.1982, D.S. Chandler, sift birch litter, 1 sex? Norton Pool, 2 mi E East Inlet Dam, 7.IX.1984, D.S. Chandler, sift spruce / fir leaf litter, 1 female. 17 km S Gorham, Glen Ellis Falls, 1900’, 8.IX.1987, J.M. Campbell and A. Davies, sifting litter by stream ( CNC), 9 sex? Glen Boulder Trail, White Mts., 2500’, 17.VIII.1976, J.M. and B.A. Campbell ( CNC), 1 sex? Grafton Co.: Hubbard Brook Exp. Forest, Bear Brook, 1950’, 6.VII.1983, D.S. Chandler, sift rotten wood, 1 sex? Hillsborough Co.: Miller St. Park, 22.IV.1982, D.S. Chandler, sift oak litter, 1 female. Merrimack Co.: 1 mi S Concord, Concord Airport, CZ-4a, 19.IV–11.V.2001, D.S. Chandler, D.S. Chandler, pine-oak barrens, FIT, 1 female, 1 sex?; 30.V–13.VI.2001, D.S. Chandler, pitfall trap, 1 male, 1 female, 1 sex? Strafford Co.: 1 mi SW Durham, 21.V.1982, D.S. Chandler, sift leaf litter birch sap drip, 1 female, 5 sex?; 16.V.1982, D.S. Chandler, sift litter along swamp margin, 1 sex? Durham, 31.VIII.1963, D.S. Chandler, on fungi, 3 sex? 4 mi W Durham, 18–21.VI.1982, R.M. Reeves, malaise trap, 1 sex? East Foss Farm, 1 km S Durham, 26m, 13.IX.2007, B.W. Sanford, berlese litter, sex?; 13.IX.2007, H.E. Roberts, berlese litter, forest, 1 sex?; 32m, 21.IX–4.X.2007, ZOOL 745/845 class, old burned field, pitfall, sex?; 26m, 21.IX–4.X.2007, ZOOL 745/845 class, forest, pitfall trap, 1 female; 26m, 5–18.X.2007, ZOOL 745/845 class, pitfall trap, forest, 2 sex? East Foss Farm, 1 km SW Durham, 29.VII.2009, 20.VIII.2009, J.K. Insinga, fungus/ mushroom walk, younger forest, 4 sex? Spruce Hole, 3 mi SW Durham, 9–10.VI.1982, window trap, 27.V–10.VI.1987, FIT, 10–23.VII.1987, FIT, 3 females, 2 sex?; 12.VI.1982, sift beech litter, 1 female; 9.VI.1982, D.S. Chandler, sift fern & pine litter on bog edge, sex?; 9.VI.1982, D.S. Chandler, sift oak, beech & huckleberry litter along bog margin, 1 sex?; 26.V.1987, D.S. Chandler, sift leaf litter on bog margin, 1 female. West Foss Farm, 1 km S Durham, N43 07.370, W70 56.639, 2–16.IX.2004, ZOOL 745/845 class, FITrap, forest, 2 sex?; N43 07.355, W70 56.609, 23.IX.2004, ZOOL 745/845 class, sift forest litter, berlese sample, 1 sex? West Foss Farm, 1 km S Durham, 7.VIII.2009, 17.IX.2009, J.K. Insinga, fungus/ mushroom walk, younger forest, 2 sex?; 17.IX.2009, J.K. Insinga, fungus/ mushroom walk, older forest, 1 sex? Vermont, Addison Co.: Bryant Mt. Summit, 2 mi N Lake Dunmore, 25.VI.1985, R.M. Reeves, sift red & chestnut oak litter, 2 females.