Dorcus darwinii Hope 1841: 302 (orig. comb.)
Dorcus rufipes Solier 1851: 50 (synonym)
Dorcus spinolae Solier 1851: 52 (synonym)
Dorcus leiocephalus Solier 1851: 53 (synonym)
Dorcus modestus F. Philippi 1859: 657 (synonym)
Dorcus liocephalus Van Roon 1910: 45 (unjust. emend.)

Erichius darwinii, male (left) and female. ...Photos by M.J. Paulsen.

Distribution of E. darwinii (circles).

Distribution:

Darwin's flightless stag beetle is widely distributed in the forests of central Chile.

Taxonomy:

Paulsen, M.J. 2010. The stag beetles of southern South America (Coleoptera: Lucanidae). Bulletin of University of Nebraska State Museum 24: 1-148. Available here.

Weinreich, E. 1958. Die südamerikanische Lucanidengattung Pycnosiphorus (Ins. Col.). Senckenbergiana Biologica 39: 265-288.

Remarks:

This species was partially confused with E. femoralis in Weinreich (1958). Although some specimens of E. darwinii also have red femora, the two species are quite distinct in mandibular form and size. Specimens of E. darwinii with black legs were misidentified as "Pycnosiphorus fairmairei" Weinreich (1958).