Silusa densa Fenyes, 1909

Webster, Reginald, Klimaszewski, Jan, Pelletier, Georges & Savard, Karine, 2009, New Staphylinidae (Coleoptera) records with new collection data from New Brunswick, Canada. I. Aleocharinae, ZooKeys 22 (22), pp. 171-248 : 210-213

Silusa densa Fenyes, 1909

Fig 32, Map 32

New Records. CANADA, New Brunswick, York Co. Charters Settlement, 45.8188°N, 66.7460°W, 21.III.2005, 27.III.2005 (5 ♁, 2 ♀, 3 sex undetermined, RWC) ; Charters Settlement, 45.8395°N, 66.7391°W, 30.V.2007 (1 ♁, RWC) .

Bionomic Notes. Most adults of S. densa were found under bark of spruce logs infested with Scolytinae in late March when a deep snow pack was still present. Silusa densa co-occurred with Leptusa jucunda Klimaszewski and Majka and mating pairs of both species were observed when they were collected. It was sunny and the air temperature was near 5°C when the adults were collected, although the surface of the log was

Map 32. Collection localities in New Brunswick, Canada of Silusa densa .

considerably warmer. One adult was also collected under tight bark of a dead standing balsam fir ( Abies balsamea (L.) Mill.) during late May. Collection method: hand searching subcortical habitat.

Distribution in Canada and Alaska. AB, NB (Klimaszewski et al. 2003; Gouix and Klimaszewski 2007). Th e presence of this species in New Brunswick suggests a much wider distribution in Canada.

Tribe Placusini Mulsant and Rey, 1871

Placusa incompleta Sjöberg, 1934

Fig 33, Map 33

New Records. CANADA, New Brunswick, York Co. Charters Settlement, 45.8286°N, 66.7365°W, 3.VI.2008 (1 sex undetermined, 5 ♁, 4 ♀, RWC).

Bionomic Notes. Adults were found in mature red spruce and red maple forest, under bark of red spruce infested with Dendroctonus rufipennis (Kirby) and Polygraphus rufipennis (Kirby) . Collection method: hand searching subcortical habitat.

Distribution in Canada and Alaska. This is a Holarctic or adventive Palaearctic species recorded in Canada from BC, QC, NB, NS ( Klimaszewski et al. 2001; Gouix and Klimaszewski 2007).

34 35 36

Figures 3Į–36. 3Į Phymatura blanchardi 32 Silusa densa 33 Placusa incompleta 34 P. tacomae 35 P. vaga 36 Aloconota sulcifrons [32, 36, apical part of abdomen removed]. Scale = 1 mm

Map 33. Collection localities in New Brunswick, Canada of Placusa incompleta .