Proceratium silaceum Roger, 1863 valid
Proceratium silaceum Roger, 1863a: 172 (w.) NORTH AMERICA. Nearctic.
Primary type information: Type-material: holotype worker. Type-locality: North America (no further data). Type-depository: MNHU. Type notes: Wheeler, 1915b: 390, refers to “four cotypes of silaceum” with collection data U.S.A.: Pennsylvania, Beatty (P.J. Schmitt). These specimens (presumably in MCZC) are not type-material.
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