Polyptychus trilineatus, the common crenulate hawkmoth, is a moth of the family Sphingidae. It is known from large parts of South Asia.
Description The wingspan is 74–112 mm.
Biology The larvae feed on Ehretia species.
Subspecies Polyptychus trilineatus trilineatus (northern India, Nepal, Myanmar, southern China (Hainan), Thailand and Vietnam) Polyptychus trilineatus celebensis Clark, 1929 (Sulawesi) Polyptychus trilineatus costalis Mell, 1922 (southern China) Polyptychus trilineatus javanicus Gehlen, 1931 Polyptychus trilineatus kelanus Jordan, 1930 Polyptychus trilineatus luteatus Rothschild & Jordan, 1903 (southern India, Sri Lanka) Polyptychus trilineatus mincopicus Jordan, 1930 Polyptychus trilineatus sonantis Jordan, 1930 Polyptychus trilineatus philippinensis Rothschild & Jordan, 1903 (Philippines)
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