A revision of the genus Pachyrhinus Schӧnherr 1823 (Coleoptera: Curculionidae Entiminae) in the Nearctic Region Author Benzel, Joseph C. P. Gillete Museum of Arthropod Diversity, Department of Biological Sciences and Pest Management. Colorado State University, Fort Collins, CO 80525 & Current address: 2265 Wolfensberger Road, Castle Rock, CO 80109 Author Bright, Donald E. C. P. Gillete Museum of Arthropod Diversity, Department of Biological Sciences and Pest Management. Colorado State University, Fort Collins, CO 80525 text Zootaxa 2021 2021-07-15 4999 6 501 533 journal article 10.11646/zootaxa.4999.6.1 1175-5326 5119668 2355BCA5-4260-4CDF-8545-8FD854D3E6A5 Key to the Nearctic species of Pachyrhinus 1 Scales in mottled color pattern on elytral disc ( Figs. 11–12 ). Aedeagus highly arcuate with a tapered tip ( Figs. 75–77 ), spermatheca variable........................................................................................ 2 - Scales not in mottled pattern ( Fig. 10 ). Aedeagus feebly arcuate with a wide blunt tip ( Fig. 41–43 ), spermatheca C-shaped ( Fig. 44 ). Temperate North America................................................................... P. elegans 2 Scales 1.5X as long as wide, with blunt tips, teardrop shaped ( Fig. 8 ). Elongate interspersed scales on elytra bluntly tipped and recumbent to slightly appressed ( Fig. 97 ). Spermatheca comma-shaped ( Fig. 101 ). Western North America...... P. cinereus - Scales 2.0 to 4.0X long as wide with tapered ends sometimes setose in form ( Fig. 7 ). Interspersed scales long, tightly appressed, elytral surface often setose ( Fig. 74 ), spermatheca C-shaped ( Fig. 78 ). California, Oregon, Washington and British Columbia .......................................................................................... P. californicus