One such story is the fate of Trigonopselaphus herculeanus (Laporte), 1835. The species was described originally in the genus Staphylinus (like anything else in those early days) by Laporte, whose full name was François Louis Nompar de Caumont LaPorte, comte de Castelnau. Neal Evenhuis wrote recently a great paper in Zootaxa regarding Laporte and the mysterious loss of (part of) his collection. To make a long story short, Laporte decided to donate his personal collection to the USA and the collection arrived in the National Institution (later to be called Smithsonian) in 1842. Unfortunately, that collection was destroyed by fire in 1865. But perhaps the type of T. herculeanus was not included in the materials destroyed by fire?
A second collection of Laporte is held today in Australia at Museum Victoria but that collection contains only his later materials. Ken Walker (curator at Museum Victoria) explained to me that Laporte kept little cardboard drawings of all the species he did not have for his second collection. And unfortunately, a drawing of T. herculeanus was present in his Staphylinidae drawer at the Museum Victoria.