Scyphophorus Schoenherr, 1838
Diagnosis: Moderately large, 12-18 mm in total body length; elongate-oval in form, uniformly black; antennal funicle of 6 articles, club with apical pilose part minute, visible only as a narrow line in lateral view, scape cylindrical, apex extended beyond posterior margin of eye; rostrum cylindrical; anterior margin of pronotum straight behind eye; tarsus of 5 articles, but article 4 small, located at very base of article 3, article 3 distinctly wider than 2 and bilobed ventrally, ventral pilosity of article 3 limited to apical margin as a continuous fringe; scutellum triangular, widest at or near base.
Natural history: This species is commonly known as the "sisal weevil". It is associated primarily with plants of the genus Agave, but also with Dasilirion, Furcroea tuberosa, Yucca and Dracaena draco. Larvae bore into the stems and leaves.
Diversity: Two species of Scyphophorus are
known. Only Scyphophorus acupunctatus Gyllenhal is known from
Scyphophorus acupunctatus Gyllenhal
Distribution: Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua and United States; also in West Indies and South America. The natural distribution of this species is not known. It may have been widely introduced in ornamental Agave and Yucca plants.Natural history: Throughout its range this species is primarily associated with a variety of species in the century plant genus Agave. Other reported hosts include Dasylirion, Dracaena draco, and Yucca glauca. In Costa Rica adults have been collected on Agave americana and Furcroea tuberose (Vaurie 1971). Larvae mine the leaves and stems.
Details of the natural history of this species on agave in Mexico are available at http://www.colpos.mx/agrocien/Bimestral/2001/nov-dic/art-9.pdf
A record of association of this species with Polianthes tuberosa L. is available at http://www.fcla.edu/FlaEnt/fe85p392.pdf