Ochraethes cinereolus (Bates, 1892) comb. nov.

Trichoxys cinereolus Bates, 1892: 162 .

Ochraethes octomaculata Chemsak & Noguera, 2001: 51, syn. nov.

Trichoxys cinereolus – Aurivillius 1912: 382 (cat.). — Chemsak 1967: 80 (lect.).

Trichoxys cinereola – Blackwelder 1946: 580 (cat.).

Tanyochraethes cinereola – Chemsak & Linsley 1965: 148. — Chemsak et al. 1992: 70 (cat.). — Chemsak & Noguera 1993: 62 (distr.). — Noguera & Chemsak 1996: 401 (cat.).

Tanyochraethes cinereolus – Monné 1993: 25 (cat.); 2005: 112 (cat.); 2021: 157 (cat.). — Monné & Giesbert 1994: 117 (cat.). — Monné & Hovore 2006: 47 (cat.). — Noguera & Gutiérrez 2016: 658 (distr.). — Pérez-Flores et al. 2021: 466 (checklist). — Bezark 2021: 75 (checklist).

Ochraethes octomaculata – Monné 2005: 108 (cat.); 2021: 146 (cat.). — Monné & Hovore 2006:46 (cat.). — Noguera & Gutiérrez 2016: 658 (distr.). — Pérez-Flores et al. 2021: 466 (checklist). — Bezark 2021: 74 (checklist).

Trichoxys cinereolus was originally described by Bates (1892) in the genus Trichoxys, and subsequently transferred to Tanyochraethes by Chemsak & Linsley (1965). On the other hand, O. octomaculata was originally described by Chemsak & Noguera (2001). The characters that support this synonymy are the frons transverse (Fig. 4C–D), the elytral apex oblique-truncate, the mesoventral process moderate elevated; even the pattern of the pubescence on the elytra is the same. This pattern of pubescence on the elytra is similar in Tanyochraethes anthophilus (Chevrolat, 1860), T. clathratus (Chevrolat, 1860), and T. tildeni Chemsak & Linsley, 1965 . However, the shape of the frons and vertex is totally different. Accordingly, we consider O. octomaculata as a junior synonym of T. cinereolus . We used characters of the type specimens of both species to stablish the new combination for Ochraethes cinereolus .