Revision Of The Weevil Genera Magdalinops Dietz And Chelonychus Dietz (Coleoptera: Curculionidae, Anthonomini)

Four species of Anthonomini from western North America are assigned to the genus Magdalinops Dietz: M. vittipennis Dietz from California, the type species; M. knowltoni, new species, from Utah; M. falli, new species, from California, Nevada, Oregon and Wyoming; and M. alutaceus (Hatch), new combination, transferred from Epimechus Dietz, from British Columbia, California, Colorado, Idaho, Montana, North Dakota, Oregon, Utah, Washington and Wyoming.

The species of Magdalinops are distinguished by the shining, glabrous basal segment of the compact, ovoid antennal club and by narrowly separated mesocoxae. Adults of these species have been collected on plants in either Artemisia or Chrysothamnus (Asteraceae). Two species of Anthonomini, also from western North America, are assigned to Chelonychus Dietz: C. longipes Dietz, the type species, and C. stragulus (Fall), new combination, transferred from Epimechus.

The species of Chelonychus are distinguished from other anthonomines by the long, slender, strongly flexed tarsal claws. Adults of one of the species have been collected on Artemesia ludoviciana Nutt. (Asteraceae).

Shared possession of exceptionally long, slender tarsal claws by species of Chelonychus and some species of Magdalinops, and common association with Artemesia are indications that the two weevil genera are closely related.