Hoogerwerf also says: "All types mentioned in this paper are in the Zoölogical Museum at Bogor (Indonesia); paratypes are in the Rijksmuseum van Natuurlijke Historie at Leiden (Netherlands)" ... the latter being today's Naturalis
), which make me think that Justin might know who is hiding, lurking behind the mardii
The Paper itself; Hoogerwerf, A. (1962) Some ornithological notes on the smaller Islands around Java (with the description of seven new subspecies). Ardea
50 (3-4) : 180–206, can be seen, in full, here
(free access for anyone, if only having registered an e-mail-address, but no problem ...)
The same paper also incl. for example: "Dicrurus hottentottus faberi
", "Turnix suscitator baweanus
", "Psittacula alexandri kangeanensis
" ... and so on.
Also note that those collections were made "Between 1950 and 1957 ...", thereby I suppose you (or anyone else, of course) ought to look for a Mr. Mard (or Mardi?) working for the Bogor Museum in that certain period.
Good luck finding him!