Taxon classification Animalia Coleoptera Staphylinidae

Trichiusa robustula Casey, 1894 Figs 303-309

Trichiusa robustula (For diagnosis, see Brunke et al. 2012)

Material examined.

New Brunswick, York Co., Fredericton, at Saint John River, 45.9588°N, 66.6254°W, 4.VII.2004, R.P. Webster // Margin of river, in drift material, mostly maple seeds (1 sex undetermined, LFC); Charters Settlement, 45.8395°N, 66.7391°W, 6.IX.2005, 16.IX.2005, 25.IX.2005, 27.IX.2005, 28.IX.2005, 23.IV.2008, 27.IV.2008, R.P. Webster, coll. // Mixed forest, in compost (decaying vegetable matter) (4 ♂, 1 ♀, 3 sex undetermined, LFC; 3 ♂, 3 ♀, 3 sex undetermined, RWC).

Natural history.

Most individuals of Trichiusa robustula from NB were sifted from compost near a mixed forest during April and September. The species was very common at this site. One individual from a river margin was sifted during July from drift material consisting mostly of maple seeds. Brunke et al. (2012) reported this species from debris along lakeshores and from a grass pile and leaves near a lakeshore in ON.

Distribution in Canada.

ON, NB (Bousquet et al. 2013). Brunke et al. (2012) reported Trichiusa robustula for the first time for Canada from ON.