Chlaenius (Chlaenius) sericeus sericeus (Forster) 1771  

Found at the margin of the river on wet silt and sand where there is sparse vegetation; made active by splashing. These beetles are fully winged and fly; they are attracted to lights. They were also observed running in the sunshine (Larochelle, 1975a). Many examples were collected on the Island and adjacent shores between 1901 and the present (HSB, EAS, TLE & DRW). One teneral specimen was collected in July. Mating occurs in May in Quebec (Larochelle, 1972e). The adults were collected in April through August and November. Adults hibernate. Larochelle (1974b) found these beetles hibernating on "mounds" and six inches deep in "mounds" in November and December in Quebec. Total length, 11.4 to 16.1 mm (13.8).

Synonyms: Chlaenius perviridis, LeConte, 1848; Chlaenius uteanus, Casey, 1914