New Brunswick, York Co., 15 km W of Tracy off Rt. 645, 45.6848°N, 66.8821°W, 16–30.VI.2010, R. Webster & C. MacKay, old red pine forest, Lindgren funnel trap (1, RWC).

This species occurs under bark of deciduous trees (Bousquet and Laplante 2006). The only specimen from New Brunswick was collected in a Lindgren funnel trap deployed in an old red pine (Pinus resinosa Ait.) forest. The adult was captured during June.

. ON, QC, NB (Bousquet and Laplante 2006).

New Brunswick, Queens Co., Rees near Grand Lake, 46.0016°N, 65.9466°W, 29.V.2007, S. Makepeace & R. Webster, in barred owl nest in an artificial nest box (2, CNC, RWC).

. This species was reported from flicker (Colaptes auratus L.) nests by Kovarik and Caterino (2001). The specimens from New Brunswick were found in nest material of a barred owl nest with chicks. Euspilotus rossi was found in only one of 23 barred owl nests sampled (Webster and Makepeace, unpublished data), suggesting that this is not the usual habitat for this species. The two adults were collected in late May.

ON, QC, NB (Bousquet and Laplante 2006). Only a few specimens of this rare species are known from Canada (Bousquet and Laplante 2006).

New Brunswick, Carleton Co., Benton, 45.9961°N, 67.5864°W, 24.V.2007, Makepeace & R. Webster, in barred owl nest in natural tree cavity (1, RWC). Queens Co., Pleasant Villa, 45.7023°N, 66.1732°W, 15.VI.2007, S. Makepeace & R. Webster, in barred owl nest in natural tree cavity (4, RWC, NBM); McAlpines near Upper Hampstead Rd., 45.7250°N, 66.1200°W, 3.VI.2007, S. Makepeace & R. Webster, in barred owl nest in natural tree cavity (4, RWC, NBM); Rees, near Grand Lake, 46.0016°N, 65.9466°W, 29.V.2007, S. Makepeace & R. Webster, in nest contents of barred owl in an artificial nest box (8, NBM). Sunbury Co., Noonan, 45.9923°N, 66.4099°W, 2.VI.2007, S. Makepeace & R. Webster, in barred owl from tree hole 7 m high in red maple, damp organic material with small bones (1, NBM);Acadia Research Forest, 45.9866°N, 66.3841°W, 2–9.VI.2009, R. Webster & M.-A. Giguère, mature (100 year-old) red spruce forest with scattered red maple and balsam fir, Lindgren funnel trap (1, AFC). Westmorland Co., Sackville near Ogden Mill, 45.9216°N, 64.3893°W, 12.V.2006, S. Makepeace & R. Webster, in great horned owl nest (2, RWC, NBM). York Co., Charters Settlement, 45.8428°N, 66.7278°W, in decayed mushrooms, 16.IX.2004, R. P. Webster (1, RWC); Keswick Ridge, 46.0040°N, 66.8776°W, 23.V.2006, S. Makepeace & R. Webster, in barred owl nest in natural tree cavity (2, RWC, NBM); Pokiok Settlement (String Bog), 45.9101°N, 67.1235°W, 26.VI.2007, S. Makepeace & R. Webster, in barred owl nest in natural tree cavity (1, RWC); Marysville, 45.9750°N, 66.5700°W, 22.VI.2007, S. Makepeace & R. Webster, in barred owl nest, with dry organic material and remains of squirrel, birds, and insect parts (4, RWC, NBM).

Little information was previously known about the habitat and biology of this species. Bousquet and Laplante (2006) reported one specimen from porcupine (Erethizon dorsatum (L.)) dung piled in a cavity at the base of an old sugar maple (Acer saccharum Marsh.). Most specimens from New Brunswick were collected from nest material of barred owl nests (most with chicks) in natural cavities in trees or in artificial nest boxes. Others were collected from a great horned owl (Bubo virginianus Gmelin) nest, decaying mushrooms, and a Lindgren funnel trap. This species is probably associated with birds and possibly mammals that nest in tree cavities. The nest contents of the barred owls and great horned owl contained decaying animal remains, and often many Diptera larvae were present on which the predaceous histerid adults and larvae were probably feeding. Adults were collected during May, June, and September.

BC, AB, ON, QC, NB, NS (Bousquet and Laplante 2006).

New Brunswick, Kings Co., near Quarries, 45.6005°N, 66.0500°W, 25.IX.2005, S. Makepeace & R. Webster, in barred owl nest in nest box on red maple, dry litter (2, RWC). Queens Co., Elm Hill, 45.7140°N, 66.1315°W, 27.VI.2007, S. Makepeace & R. Webster, in barred owl nest in tree hole in red oak, damp (urine smell) organic material with feathers, fur and small bones (2, RWC).

This species was collected from nest material from barred owl nests in natural cavities in trees or artificial nest boxes. Bousquet and Laplante (2006) reported this species as occurring in similar habitats. Adults were collected during June and September.

BC, AB, MB, ON, QC, NB, NS (Bousquet and Laplante 2006). This species is possibly adventive in North America (Bousquet and Laplante 2006).

New Brunswick, Queens Co., Bayard, at Nerepis River, 45.4473°N, 66.3318°W, 24.V.2009, R. P. Webster, river margin, on sand bar in debris on sand (2, RWC).

A few specimens from Quebec were found on sandy beaches along rivers (Bousquet and Laplante 2006). The New Brunswick specimens were found in debris resting on sand on a sand bar along a small river during late May.

ON, QC, NB (Bousquet and Laplante 2006).

New Brunswick, Kings Co., near Quarries, 45.6005°N, 66.0500°W, 25.IX.2005, S. Makepeace & R. Webster, in barred owl nest in nest box on red maple, dry litter (1, RWC). Queens Co., Central Hampstead, 45.6575°N, 66.1412°W, 13.VII.2006, S. Makepeace & R. Webster, hardwood ridge, in nest of barred owl in tree hole (3, RWC, NBM); Elm Hill, 45.7140°N, 66.1315°W, 27.VI.2007, S. Makepeace & R. Webster, in barred owl nest in tree hole in red oak, damp (urine smell) organic material with feathers, fur and small bones (1, RWC); Pleasant Villa, 45.7023°N, 66.1732°W, 15.VI.2007, S. Makepeace & R. Webster, in barred owl nest in natural tree cavity (1, RWC); McAlpines near Upper Hampstead Rd., 45.7250°N, 66.1200°W, 3.VI.2007, S. Makepeace & R. Webster, in barred owl nest in natural tree cavity (4, RWC, NBM); Rees near Grand Lake, 46.0016°N, 65.9466°W, 29.V.2007, S. Makepeace & R. Webster, in nest contents of barred owl in artificial nest box (1, RWC). York Co., Marysville, 45.9750°N, 66.5700°W, 22.VI.2007, S. Makepeace & R. Webster, in barred owl nest, with dry organic material and remains of squirrel, birds, and insect parts (1, RWC).

Most specimens of Dendrophilus kiteleyi were found in tree cavities in deciduous trees (Bousquet and Laplante 2006). All specimens from New Brunswick were collected from nest material from barred owl nests (most with chicks) in natural cavities in trees or in artificial nest boxes. Adults were collected during late May, June, July, and September.

AB, MB, ON, QC, NB (Bousquet and Laplante 2006).

New Brunswick, Queens Co., Elm Hill, 45.7140°N, 66.1315°W, 27.VI.2007, S. Makepeace & R. Webster, in barred owl nest with chicks in a natural cavity in a red oak (1, RWC).

In Europe, this species was frequently found in bird nests, granaries, and mills (Hinton 1945). In Canada, most records of this species were from tree cavities in deciduous trees (Bousquet and Laplante 2006). The specimen from New Brunswick was taken from the nest material of a barred owl in a tree cavity in a red oak (Quercus rubra L.) during late June.

MB, ON, QC, NB, NS (Bousquet and Laplante 2006). This adventive species is now widespread in North America (Bousquet and Laplante 2006).

New Brunswick, York Co., Fredericton, 28.VI.1929, L. J. Simpson, in tunnel of Ips pini (in pine) (1, AFC).

This species occurs under bark of dead pines (Bousquet and Laplante 2006). The New Brunswick specimen was found in a tunnel of Ips pini (Say), presumably in a dead pine. The adult was captured during late June.

ON, QC, NB (Bousquet and Laplante 2006).

New Brunswick, Charlotte Co., Oak Bay, 6.VII.1928, L. J. Simpson, from Ips pini tunnels (1, AFC). Sunbury Co., Acadia Research Forest, 45.9866°N, 66.3841°W, 18–24.VI.2009, 24-30.VI.2009, 18-31.VIII.2009, R. Webster & M.-A. Giguère, mature (110 year-old) red spruce forest with scattered red maple and balsam fir, Lindgren funnel traps (3, AFC, RWC). York Co., Taymouth, 29.VI.1929 (no collector given) (1, AFC); Fredericton, 22.VI.1929, L. J. Simpson, (1, AFC); 15 km W of Tracy off Rt. 645, 45.6848°N, 66.8821°W, 21-28.VI.2009, 7-14.VII.2009, 4-11.VIII.2009, 11-18.VIII.2009, R. Webster & M.-A. Giguère, old red pine forest, Lindgren funnel traps (4, AFC, RWC); same locality data but 6.VI.2009, R. Webster & M.-A. Giguère, old red pine forest, under bark scales of recently fallen red pine (4, RWC); 14 km WSW of Tracy, S of Rt. 645, 45.6741°N, 66.8661°W, 10-26.V.2010, R. Webster & C. MacKay, old mixed forest with red and white spruce, red and white pine, balsam fir, eastern white cedar, red maple, and Populus sp., Lindgren funnel traps (6, AFC).

This species is found under bark of dead pines (Pinus spp.), spruce (Picea spp.), and larches (Larix sp.) (Bousquet and Laplante 2006). In New Brunswick, specimens were collected from Ips pini tunnels, from under bark scales of a recently fallen red pine, and in Lindgren funnel traps in a variety of forest types with conifers. Adults were collected during May, June, July, and August.

AB, SK, MB, ON, QC, NB, NS (Bousquet and Laplante 2006).

New Brunswick, Carleton Co., Meduxnekeag Valley Nature Preserve, 46.1888°N, 67.6762°W, 20.V.2005, R. P. Webster (1, RWC). Northumberland Co., 12.0 km SSE of Upper Napan near Goodfellow Brook, 46.8943°N, 65.3810°W, 23.V.2007, R. P. Webster, recent clear-cut, under bark of spruce log (1, NBM). Queens Co., Cranberry Lake P.N.A. (Protected Natural Area), 46.1125°N, 65.6075°W, 25.VI.2009, R. Webster & M.-A. Giguère, mature red oak forest, on dead red oak trunk (1, AFC); same locality data and forest type, 13–25.V.2011, 29.VI–7.VII.2011, M. Roy & V. Webster, Lindgren funnel traps (2, NBM). Restigouche Co., Jacquet River Gorge P.N.A., 47.8779°N, 66.0013°W, 13.VI.2009, R. P. Webster, mixed forest, under bark of birch with fermented sap (2, RWC). Sunbury Co., Portobello Creek N.W.A., 45.8992°N, 66.4248°W, 5.VI.2004, R. P. Webster (1, RWC); Lakeville Corner, 45.9007°N, 66.2423°W, 27.VIII.2006, R. P. Webster, silver maple swamp, among polypore fungi on poplar log (1, NBM). York Co., near Magaguadavic Lake, 45.7283°N, 67.1818°W, 24.IV.2004, D. Sabine & R. Webster (3, NBM, RWC); Charters Settlement, 45.8340°N, 66.7450°W, 14.V.2004, R. P. Webster (1, RWC); 15 km W of Tracy off Rt. 645, 45.6848°N, 66.8821°W, 4–11.VIII.2009, R. Webster & M.-A. Giguère, old red pine forest, Lindgren funnel trap (1, AFC).

Platysoma leconti is found under bark of a variety of dead deciduous tree species (maples (Acer spp.), oaks (Quercus spp.), elm (Ulmus spp.), poplars (Populus sp.), ashes (Fraxinus spp.)) and pines (Bousquet and Laplante 2006). In New Brunswick, this species was found under bark of a red oak, under bark with fermented sap of a dead standing birch (Betula sp.), and among polypore fungi on a poplar log. Adults were also caught in Lindgren funnel traps. Adults were captured during April, May, June, and August.

NT, BC, AB, SK, MB, ON, QC, NB, NS (Bousquet and Laplante 2006).

New Brunswick, York Co., Charters Settlement, 45.8456°N, 66.7267°W, 10.VI.2010, R. P. Webster, beaver dam among sticks and debris on top of dam (2, RWC).

Atholus perplexus has been collected from North American beaver (Castor canadensis Kuhl) lodges, muskrat (Ondatra zibethicus (L.)) nests, and in manure (Bousquet and Laplante 2006). The specimens from New Brunswick were collected among sticks and debris on top of a beaver dam. Beaver dung was present in the material on the top of the dam. The two adults were collected during June.

SK, MB, ON, QC, NB, PE, NS (Bousquet and Laplante 2006).

New Brunswick, York Co., Charters Settlement, 45.8340°N, 66.7450°W, 20.VIII.2006, R. Webster, well decayed gilled and boletus mushrooms placed in an opening of 20 year-old regenerating mixed forest (1, RWC).

This species occurs in compost, dung, and carrion (Bousquet and Laplante 2006). The specimen from New Brunswick was found in well-decayed mushrooms during August.

ON, QC, NB (Bousquet and Laplante 2006).

New Brunswick, Gloucester Co., 3 Vinot Rd. (Duguayville), 17.VI.1941, E. Dugway, 41-L68 (FIS) (1, AFC). York Co., Charters Settlement, 45.8340°N, 66.7450°W, 8.VIII.2006, 14.VIII.2006, 20.VIII.2006, R. P. Webster, baited with well-decayed gilled and boletus mushrooms (7, RWC); 15 km W of Tracy off Rt. 645, 45.6848°N, 66.8821°W, 28.VI–7.VII.2009, R. Webster & M.-A. Giguère, old red pine forest, Lindgren funnel trap (1, AFC).

Most adults from New Brunswick were collected from well-decayed gilled and boletus mushrooms that had been placed in an opening in a 20-year-old regenerating mixed forest. One individual was caught in a Lindgren funnel trap deployed in an old red pine forest. Adults were collected during June, July, and August. Little was previously known about the biology of this species (Bousquet and Laplante 2006).

ON, QC, NB, NS (Bousquet and Laplante 2006).

New Brunswick, Carleton Co., Meduxnekeag Valley Nature Preserve, 46.1964°N, 67.6340°W, 31.V.2005, M.-A. Giguère & R. Webster, old mixed forest, in moist leaf litter at the margin of a vernal pond (1, RWC); Lower Woodstock, 46.1192°N, 67.5795°W, 7.V.2008, R. P. Webster, pasture, entrance to fox den (3, RWC). York Co., Charters Settlement, 45.8430°N, 66.7275°W, 5.V.2006, R. P. Webster, in porcupine dung at the entrance of a porcupine den (1, RWC).

This species has been collected in woodchuck (Marmota monax (L.)) burrows and carrion (Bousquet and Laplante 2006). In New Brunswick, adults were collected from the entrance of a fox (Vulpes sp.) den, the entrance of a porcupine den in dung, and in moist leaf litter on the margin of a vernal pond. Adults were collected during May.

ON, QC, NB, NS (Bousquet and Laplante 2006).

New Brunswick, Carleton Co., Lower Woodstock, 46.1192°N, 67.5795°W, 7.V.2008, R. P. Webster, pasture, entrance to fox den (1, RWC).

This species is commonly found in woodchuck burrows early in the spring and also in various decaying organic material such as carrion, dung, and decaying mushrooms (Bousquet and Laplante 2006). The specimen from New Brunswick was collected from the entrance of a fox den in May.

MB, ON, QC, NB, NS (Bousquet and Laplante 2006).

New Brunswick, Charlotte Co., 3.0 km NW of Pomeroy Ridge, 45.3095°N, 67.4343°W, 16.VI.2008, R. P. Webster, old growth eastern white cedar swamp, in moss and leaf litter near small vernal pool (1, RWC). Sunbury Co., Acadia Research Forest, 45.9866°N, 66.3841°W, 2-9.VI.2009, R. Webster & M.-A. Giguère, mature (110 year-old) red spruce forest with scattered red maple and balsam fir, Lindgren funnel trap (1, RWC).

One of the New Brunswick specimens was collected in moss and leaf litter near a vernal pond, the other from a Lindgren funnel trap. In Indiana (USA), the species was usually found in cow dung and was frequent under “chunks” on the beach of Lake Michigan (Blatchley 1910). Adults were collected during June in New Brunswick.

BC, AB, SK, MB, ON, QC, NB (Bousquet and Laplante 2006).

New Brunswick, Kings Co., ca. 2 km WSW of Browns Flat, 45.4667°N, 66.1668°W, 8.VII.2009, S. Makepeace & R. Webster, in barred owl nest box, moist organic debris and sawdust with owl pellets, small bones, feathers, with urine smell (1, RWC). Queens Co., Central Hampstead, 45.6575°N, 66.1412°W, 13.VII.2006, S. Makepeace & R. Webster, hardwood ridge, in barred owl nest in tree hole (1, RWC); Elm Hill, 45.7140°N, 66.1315°W, 27.VI.2007, S. Makepeace & R. Webster, in barred owl nest in tree hole in red oak, damp (urine smell) organic material with feathers, fur and small bones (1, RWC); Cumberland Bay, 46.0000°N, 65.9333°W, 28.VI.2009, Makepeace & R. Webster, in barred owl nest, moist leaves and debris with owl pellets, small bones, with urine smell (1, RWC); ca. 1.5 km NW of McAlpines, 45.7333°N, 66.1333°W, 8.VII.2009, S. Makepeace & R. Webster, in barred owl nest box, moist organic debris and sawdust with owl pellets, small bones, feathers, with urine smell (2, RWC). York Co., Marysville, 45.9750°N, 66.5700°W, 22.VI.2007, S. Makepeace & R. Webster, nest box contents of barred owl, with dry organic material and remains of squirrel, birds, and insect parts (1, NBM).

In Europe, this species occurs in dung, fungi, compost, and decaying vegetables and in bird nests and henhouses (Vienna 1980). All specimens of this adventive species from New Brunswick were collected from nest material from barred owl nests (most with chicks) in natural cavities in trees or in artificial nest boxes. Adults were captured during June and July.

BC, AB, MB, ON, QC, NB, NS (Bousquet and Laplante 2006).

New Brunswick, York Co., Charters Settlement, 45.8395°N, 66.7391°W, 19.VI.2004, R. P. Webster, pitfall trap baited with dog dung (1, RWC).

Relatively little is known about the habitat requirements of this species. The scant habitat data available suggest that the species is probably associated with mammal nests. Adults have been collected by sifting around a deserted mouse nest (Blatchley 1910) and from a fox burrow (Bousquet and Laplante 2006). The specimen from New Brunswick was captured during June in a pitfall trap baited with dog dung.

MB, ON, NB, NS (Bousquet and Laplante 2006). Majka (2008) considered this species to be disjunct in Nova Scotia due to a lack of records from Quebec and other regions of Atlantic Canada.