A REVIEW OF THE GENUS TACHYGONUS (COLEOPTERA, CURCULIONIDAE) NORTH OF MEXICO

Examination of types of North American Tachygonus shows that there are five valid species that occur north of Mexico: T. lecontei on oaks, T. tardipes on elm, T. centralis on locust (Robinia), T. rhombus on Coursetia, and T. fulvipes on Berchemia. Characters and placement of the genus are discussed. A key to North American species is presented as well as diagnoses and figures; five new synonymies are proposed. Variation in color patterns of T. rhombus and tardipes is documented, and that in T. lecontei is analyzed geographically. Arizona populations on oak, assigned here to T. lecontei may represent more than one distinct species, but require additional collecting and perhaps biological studies to determine species limits.