Instrumenta suctoria: mouth parts of a haustellate insect as a whole.
"Explanation of Terms Used in Entomology" by John. B. Smith
He considered it to "undoubtedly" belong to the Suctoria of De Geer, and to form a new genus of Pulicidae.
"Scientific American Supplement, No. 648, June 2, 1888." by Various
The stalk is usually solid, and expanded at the base into a disk in Suctoria.
"Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 5" by Various