The scientific study of butterflies and moths (the Lepidoptera).(noun)
Lepidoptery(noun)
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Use "lepidopterology" in a sentence
"The community college was giving an evening course in lepidopterology, and Phoebe could hardly paint fast enough to meet the demand."
"The famed author exhibited both equally in his writing and in his non-literary pursuits, which included lepidopterology, the study of butterflies and moths."
"It is not improbable that had there been no revolution in Russia, I would have devoted myself entirely to lepidopterology and never written any novels at all."