Illustrated descriptions of the male genitalia and notes on the spermathecae are provided for the Phanaeus vindex species group: P. vindex (Macleay), P. difformis (LeConte), and P. igneus (Macleay). These represent the first descriptions of the internal sac (aedeagus) for these species. Examination of the genital capsule (i.e., phallobase and parameres) and the sclerites within the internal sac (aedeagus) revealed only slight differences in shape and sclerotization. No differences were observed among the spermathecae of the three species.