Various diagnostic characters. A claw teeth perpendicular B claw teeth angled C–F fore- and hindwing of different species C Sphex vestitus, ♀, wings hyaline D Sphex formosellus, ♀, wings with yellow tinge E Sphex luctuosus, ♂, wings darkened near base F Sphex fumipennis, ♀, wings mostly darkened G frontal view of Sphex argentatus, ♂ H frontal view of Sphex latilobus, ♂.