Mexican mayflies: inventory and additions (Ephemeroptera)

The 138 species and subspecies of Ephemeroptera now known to occur in Mexic o, of which 35, approximately 25 %, are endemic, are listed along with dist ributional annotations. New Mexican records are included for Americabaetis lugoi Waltz & McCafferty, Baetodes velmae Cohen & Alien, Drunella coloraden sis (Dodds), Farrodes otiesa Lugo-Ortiz & McCafferty, Plauditus virilis (Mc Dunnough), Tricorythodes fictus Traver, I: texanus Traver, and Varipes lasi obrachius Lugo-Ortiz & McCafferty, the latter of which also constitutes a n ew continental record for the genus Varipes Lugo-Ortiz & McCafferty in Nort h America. Traverella sallei (Navas), n. comb., is transferred from the gen us Thraulus.