Atheta (Dimetrota) modesta (Melsheimer)

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 : 32

53. Atheta (Dimetrota) modesta (Melsheimer)

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

References. Melsheimer 1844. Bernhauer 1907. Casey 1910, 1911. Gusarov 2003. Majka and Klimaszewski 2008. Majka et al. 2011. Klimaszewski et al. 2018, 2021.

Distribution. Nearctic. Canada: AB, MB, NB, NS, ON, QC. USA: CT, DC, ME, MI, NH (NSR), NY, PA, RI, VT, WV.

Collection and Habitat data. The NH specimens were collected by using flight intercept, Malaise, and window traps, and by sifting various leaf litters and rotten wood. Found in fern and pine litter on bog edge, oak/pine leaf litter, leaf litter at birch sap drip, and in Russula and other mushrooms. Collected from March to November in NH. In NB found in various coniferous and hardwood forest types, usually in decaying fungi such as gilled mushrooms and fleshy fungi on the forest floor; Also found in unbaited pitfall and flight intercept traps in yellow birch/balsam fir and red spruce forests ( Klimaszewski et al. 2018).

Material. USA, Maine, Kennebec Co.: Augusta , 3.VI.1959, A.E. Brower, 1 female . York Co.: West Lebanon, 9–15.VI.1990, 17–23.VII.1990, 24–30.VII.1990, 28.VIII–3.IX.1990, 4–10.IX.1990, 18–25.XI.1991, D.W. Barry, FIT, 2 males, 5 females . New Hampshire, Belknap Co.: Lower Gilmanton , 23.IV.1982, D.S. Chandler, sift leaf litter, 1 female . Carroll Co.: 2 mi NW Wonalancet , 21.X.1983, D.S. Chandler, sift leaf litter, 1 male . Mt. Chocorua , 1.VIII.1982, W.J. Morse, fungus, 2 males, 1 female . The Bowl, 2.5 mi NW Wonalancet , 15–20.VI.1984, D.S. Chandler, window trap, 1 female ; 20.VI.1984, D.S. Chandler, sift leaf litter on spring edge, 1 female ; 4.VI.1984, D.S. Chandler, mushrooms, 1 female . 6 mi NW Bartlett, Nancy Brook Trail , 1500’, 9.IX.1987, A. Davies, sifting Fagus litter beside logs ( CNC), 1 male ; A. Davies and Y. Bousquet , ex Russula mushrooms by stream ( CNC), 2 males, 2 females, 8 sex? 2 mi NE Crawford Depot , 2100’, 13.IX.1987, J.M. Campbell and A. Davies, ex mass of mushrooms on large stump ( CNC), 2 females, 3 sex? Coos Co.: Second College Grant, nr. Swift Diamond Rd. , 44.89001, -71.136683, 20.III.2021, C. Ziadeh, pitfall trap W.1.23, 1 male . 8 mi E Gorham , 800’, 14.VIII.1976, J.M. and B.A. Campbell ( CNC) 4 sex ? 8 mi E Gorham , 800’, 15.VIII.1976, J.M. and B.A. Campbell ( CNC) 1 male, 3 females, 3 sex? Pinkham Notch, near Lost Pond , 11.IX.1987, Y. Bousquet ( CNC), 1 sex? White Mts. , Crawford Notch , Silver Cascade , 17.VIII.1976, J.M. Campbell ( CNC), 1 sex? Grafton Co.: Hubbard Brook Exp. Forest , Bear Brook , 1950’, 6.VII.1983, 1 female ; 2000’, 6.VII.1983, D.S. Chandler, sift rotten wood, 3 females . Hillsborough Co.: Miller St. Park, 22.IV.1982, D.S. Chandler, sift oak litter, 2 females . Rockingham Co.: 1 mi W Odiorne Point , 27–29.VII.1983, 2 females ; 3–5.VIII.1983, D.S. Chandler, malaise trap, 1 female . Strafford Co.: 1 mi SW Durham , 15.X–4.XI.1987, D.S. Chandler, FIT, 1 male ; 24.VIII.1986, feeding on fungus, W.J. Morse, 1 female ; 21.V.1982, sift leaf litter birch sap drip, D.S. Chandler, 1 female . 4 mi W Durham , 10.V.1982, D.S. Chandler, mushrooms, 1 male ; 6–9.VI.1982, 14–17.VI.1984, window trap, 18–21.VI.1982, R.M. Reeves, malaise trap, 4 males, 3 females, 1 sex? ; same date, window trap, R.M. Reeves, 2 males, 1 female . Durham , 4.VI.1982, W.J. Morse, on shelf fungus, 1 female . Durham , 11.X.1954, R.L. Blickle, 1 female . Spruce Hole , 3 mi SW Durham, 12–26.V.1987, 27.V–10.VI.1987, 11–18.VI.1987, 2–9.VII.1987 D.S. Chandler, FIT, 2 males, 2 females ; 9.VI.1982, sift fern & pine litter on bog edge, 1 female ; FIT, 1 male ; 12.VI.1982, D.S. Chandler, sift fir litter, 1 male . Thompson Farm, 3.5 km SW Durham , N43.11260°, W70.94792°, 17m, 8.IX.2005, oak / pine /leaf litter, 1 male ; N43.11233°, W70.94838°, 1–15.IX.2005, E.M. Wolf, oak, pine, maple forest, 1 female . West Foss Farm , 1 km S Durham, N43° 07. 370’, W70° 56.639’, 2–16.IX.2004, forest, FIT, 1 male . UNH Dudley Lot , 1 km E Lee, 18.IX.2008, forest, FIT, 1 male .