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Acrocercops Wallengren (Gracillariidae) is recorded for the first time from Chile. The little known Acrocercops serrigera serrigera Meyrick is reported from the Azapa Valley, Arica Province, northern Chilean coastal desert. Specimens were reared from Malva nicaeensis and Waltheria ovata (both Malvaceae). Specimen identification is based on comparisons of the male genitalia with that of the lectotype of the species originated from Peru. Sequences of a fragment of the mitochondrial gene cytochrome oxidase subunit I of specimens reared on both plants indicate that there is only one Acrocercops species involved as only one substitution site was found over the 524-bp sequenced.