The biology, morphology, and larval host plants are reported for 8 sphingid species in Taiwan: Langia zenzeroides formosana Clark, 1956, Phyllosphingia dissimilis hoenei Clark, 1937, Dolbina inexacta Staudinger, 1887, Daphnis nerii, L., 1758, Pergesa actea (Cramer, 1779), Acherontia lachesis (Fabricius, 1798), Theretra oldenlandiae (Fabricius 1775), and Theretra latrellei lucasii (Walker, 1885).