Pterostichus (Hypherpes) tristis (Dejean) 1828  

Found under logs and branches in the forest. The beetles are wingless and cannot fly. According to Perrault (1973) these beetles are also found under bark of fallen hardwood trees. WMM & HSB collected them in pitfall traps. Several examples were collected on the Island and adjacent shores between 1902 and the present (HSB & EAS, WLM, JLW, WMM, GGP). Teneral specimens were collected in June and July. Adults were collected in June, August, September, and October. Hibernation probably takes place in the adult stage. Total length, 10.5 to 13.5 mm (12.0).

Synonyms: Pterostichus interfector, (Newman), 1838; Pterostichus sustentus, LeConte, 1852; Pterostichus subarcuatus, LeConte, 1852; Pterostichus cordicollis, (Motschulsky), 1859; Pterostichus zephyrus, Casey, 1884; Pterostichus tetriculus, Casey, 1913