Further contributions to the Aleocharinae (Coleoptera, Staphylinidae) fauna of New Brunswick and Canada including descriptions of 27 new species Webster, Reginald P. Klimaszewski, Jan Bourdon, Caroline Sweeney, Jon D. Hughes, Cory C. Labrecque, Myriam ZooKeys 2016 573 85 216 JCBY http://zoobank.org/52F0D9B5-F397-46CB-8525-83978718B639 Klimaszewski & Webster Insecta Staphylinidae Atheta CoL Animalia Atheta (Dimetrota) bubo Coleoptera 18 103 Arthropoda species bubo Dimetrota   Taxonclassification Animalia Coleoptera Staphylinidae  Holotype (male). Canada, New Brunswick, Westmorland Co., Sackville, near Ogden Mill, 45.92155°N, 64.38925°W, 12.V,2006, Scott Makepeace, coll. // black spruce forest, in nest contents of Great Horned Owl - Bubo virginiensis(LFC).  Etymology. The species name bubo is the generic name of Bubo virginensis, the great horned owl, from the nest contents of which the holotype specimen was found, used in apposition.  Description. Body length 2.8 mm, subparallel, moderately flattened, dark brown with darker head, pronotum, and central part of abdomen, elytra with darker scutellar region, legs yellowish brown (Fig. 84); integument moderately glossy and more so on abdomen, densely punctate and pubescent, except for head and abdomen; meshed microsculpture of forebody dense and strong with hexagonal sculpticells; head narrower than pronotum, angular posteriorly, eyes large and as long as postocular area dorsally; antennae with articles V-Xsubquadrate to slightly transverse; pronotum broadest in about middle of its length, rounded laterally and basally, slightly transverse, narrower than elytra, posterior shoulders angular; elytra wider and slightly longer than pronotum; abdomen subparallel. Male. Apical margin of tergite VIII with broadly V-shaped apical emargination with small crenulations and two large lateral teeth (Fig. 86); median lobe of aedeagus with bulbus moderately large, tubus moderately long, straight with apex slightly produced ventrally in lateral view, apex narrowly triangular and rounded (Fig. 85), internal sac structures pronounced at base of tubus (Fig. 85). Female. Unknown.  Natural history. This species is known only from a single male found in the nest contents of a great horned owl ( Bubo virginensis) in a black spruce forest in May.  Distribution. Known only from NB, Canada.  Comments. The body shape of this species is somewhat similar to species of Atheta picipennisspecies group, but the genitalia are unique in its form and are not close to any species of Dimetrota.  Figures 84-87. Atheta (Dimetrota) buboKlimaszewski & Webster, sp. n.: 84 habitus in dorsal view 85 median lobe of aedeagus in lateral view 86 male tergite VIII 87 male sternite VIII. Scale bar of habitus = 1 mm; remaining scale bars = 0.2 mm.