This paper lists the species belonging to the tribe Acratini (Alonso-Zaragoza, Lyal, Bartolozzi & Sforzi, 1999) (Brentidae: Trachelizinae) in Panama and French Guiana; some of them are reported for first time in Panama: Acratus diringshofeni Soares, 1970; Acratus bellus Soares, 1970; Acratus mendax, Soares, 1970; Nemobrenthus helmenreichii (Redtenbacher, 1868) Comb. Nov., and Proteramocerus disparilis Soares & Dias, 1971; likewise Acratus pohli Soares, 1970 and Teramocerus punctirostris are recorded for first time in French Guiana, also I made mention of species recently recorded in both countries by Mantilleri (2015). Meanwhile, nomenclatural position of each one species is updated. Their taxonomy, Diagnosis, type depositories, geographical distribution, material examined, and other relevant details are presented for each species.