Figs 6, 46–52; Map 3

Gyrophaena laetula Casey, 1906: 300; Seevers 1951: 685; Moore and Legner 1975: 430.

Gyrophaena fustifer Casey, 1906: 300. Synonymized by Seevers 1951: 685.

Gyrophaena centralis Casey, 1906: 301. Synonymized by Seevers 1951: 685.

Description. Body length 1.5–1.7 mm, stout and compact; head rufo-piceous; pronotum rufo-testaceous; elytra light brown; abdomen rufo-testaceous to reddishbrown with dark brown apical portion. Punctation: vertex of head with at least 10 large umbilicate punctures on each side, pronotum irregularly punctate, median rows with punctures confused by scattered punctures; elytra finely and sparsely

Map 3. Collection localities in New Brunswick, Canada of Gyrophaena laetula

punctate. Microsculpture: finely meshed and throughout. Antennae as illustrated (Fig. 6). Pronotum 1.7 times as wide as long. MALE: tergite 8 with two large rounded teeth and 2–4 smaller median teeth (Fig. 48); sternite 8 broadly rounded apically (Fig. 49). Median lobe of aedeagus with moderately broadly elongate tubus with apical part produced ventrally and bearing small, narrow apical projection directed anteriad in lateral view (Fig. 46), dorsal projection of internal sac irregularly elongate in shape (Fig. 46). Paramere as illustrated (Fig. 47). FEMALE. Tergite 8 truncate apically (Fig. 51); sternite 8 pointed apically (Fig. 52); spermatheca as illustrated (Fig. 50).

Bionomics. Macrohabitat: Mixed forests, mature mixed forests, regenerating mixed forest, red spruce and yellow birch forest, mature red spruce and red maple forest, forested black spruce (Picea mariana (Mill.) BSP) bog with red maple. Microhabitat: on/in gilled mushrooms, on Pleurotus sp. on dead standing Populus tremuloides Michx. Collecting period: June, July, August, and September. Collecting method: sifting mushrooms and aspirating specimens.

Distribution (Map 3). CANADA: New Brunswick; UNITED STATES: District of Columbia, Illinois, Indiana, Kentucky, Massachusetts, New York, Pennsylvania, Tennessee, Virginia, and Wisconsin.