Elapochrus aequalis & Homalocranium michoacanense - R. Mintern & J. Green - Biologia Centrali-Americana - SIL-bca 04 00 00 386, Robert Mintern, 1885
Elapochrus aequalis & homalocranium michoacanense, by r. Mintern & j. Green. A plate from biologia centrali-americana. Elapochrus aequalis is now pliocercus elapoides (or maybe just the subspecies pliocercus elapoides aequalis)
homalocranium michoacanense is now sonora michoacanensis. Date: 1885.