Hohlquinte is described only by Audsley, who says: An open labial stop, of 5-1/3 ft., 2-2/3 ft., and 1-1/3 ft. pitch, the pipes of which, in the two lower pitches, are commonly made of wood, and in the 1-1/3 ft. pitch, of metal. In formation and tone, the stop resembles the unison Hohlflöte. Locher gives Quintflute as a synonym, but see Quint Flute and Quintflöte.
Osiris contains eight examples of Hohlquint and Hohlquinta: five at 2-2/3' (or 3') pitch, and one each at 5-1/3' and 1-1/3' pitch. Five of them, including the 1-1/3' example, are of treble compass only. It also lists four examples of Quintflute, all at 1-1/3' pitch, but it is not known whether any of them are of the Hohlflöte type. No examples of Holquinte are known. Contributions welcome.