The genus Epacalles Kissinger with its one included species, E. inflat
us (Blatchley), is transferred from Cryptorhynchini to Molytini, Conot
rachelina. Epacalles is closely related to species placed in the gener
a Aenesias Champion and Lepilius Champion. Generic definitions need to
be reconsidered in this group of taxa. A lectotype is designated for
Zascelis oblonga Horn (Cryptorhynchini) and this species is transferre
d to the genus Cnemidoprion as Cnemidoprion oblongus (Horn). Character
states distinguishing C. oblongus from the only other species in the
genus, C. serratipes Marshall are presented. The genus Crematogasterob
ius Hustache and Bruch originally described in Curculioninae, Cryptorh
ynchini is transferred from Cossininae, Acamptini, back to Cryptorhync
hini and is recorded for the first time from Mexico. A lectotype is de
signated for Menares pilicornis Champion and this genus and species ar
e transferred from Curculioninae, Cryptorhynchini, to Cossoninae, Acam
ptini. Menares is distinguished from other Acamptini on the basis of t
oothed femora and a maculate elytral pattern.