Proceratium crassicorne vestitum Emery, 1895 junior synonym of current valid taxon Proceratium silaceum Roger, 1863
Proceratium crassicorne var. vestitum Emery, 1895d: 266 (w.) U.S.A. (Maryland). Nearctic.
Primary type information: Primary type material: holotype worker. Primary type locality: U.S.A.: Maryland, Charlton Heights, 24. ix.1891 (no collector’s name; perhaps T. Pergande). Primary type depository: MSNG.
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