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This study aims to elucidate the bionomy of Peckia(Sarcodexia) lambensand Oxysarcodexia amorosato provide data for medical, veterinary and forensic entomology analyses. We analyzed larval stage duration (L1–L3), weight of the mature larvae (L3), pupal stage duration, L1–adult duration, adult emergence and viability of larvae and adults of both species. Larval viability of P.(S.) lambenswas 82% and the mean duration of the larval stage was 3.51±0.99 days. The mature larvae had a mean weight of 33.67±7.13mg. The mean duration of the pupal stage was 8.26±0.93 days and the mean duration of the L1–adult was 11.53±1.22 days. Mean lifespan for females and males was 39.33±1.52 and 57.33±4.72 days, respectively. Larval viability of O. amorosawas 76% and mean duration of larval stage was 3.51±0.64 days. Mature larvae had a mean weight of 28.28±3.38mg. Mean duration of the pupal stage was 10.14±0.63 days and mean duration of the L1–adult was 13.60±0.69 days. Mean lifespan for females and males was 83.66±15.94 and 84.00±19.97 days, respectively. Oxysarcodexia amorosashowed a L1–adult stage longer than P.(S.) lambens; however both species showed low viability. O. amorosalaid more larvae than P.(S.) lambens, this fact may occur because O. amorosahad longer life duration.