Dorcus femoralis Guérin-Méneville, 1839: 303 (orig. comb)
Dorcus rufifemoralis Curtis 1845: 456 (synonym)
Lucanus rubripes Hope in Westwood 1845: 26 (synonym)
Dorcus pallidocinctus Fairmaire & Germain 1861: 2 (synonym)

E. femoralis male. ...Photo by M.J. Paulsen.	Distribution of E. femoralis (circles).

Distribution:

The magellanic flightless stag beetle has an enormous distribution of over 1200 miles (2000 km) in the Magellanic forests of Patagonia. This species is the most southernly distributed stag beetle in the world. It is the largest species of Erichius.

Remarks:

This species was previously confused with E. darwinii, in part (Weinreich 1958).

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.