Myrmecocystus semirufus Emery, 1893 valid
Myrmecocystus melliger var. semirufus Emery, 1893k: 667 (w.m.) U.S.A. (California). Nearctic.
Primary type information: Primary type material: lectotype worker (by designation of Snelling, 1976: 49). Primary type locality: lectotype U.S.A.: California, San Jacinto (no collector’s name) (by restriction of Wheeler, 1908g: 355). Primary type depository: AMNH. Secondary type information: Secondary type material: 1 paralectotype worker. Secondary type locality: same as for lectotype. Secondary type depository: MSNG. Type notes: 1) Other original syntype locality: U.S.A.: Colorado, Denver (no collector’s name). 2) Creighton, 1950a: 449, cites Denver as type locality. 3) Snelling, 1976: 49, says other specimens from the San Jacinto series are in USNM.
Obsolete combinations