Remarks on the morphology and habitat of Glacies belzebuth (Praviel, 1938) (Geometridae)

On the basis of recent captures of Glacies belzebuth (Praviel, 1938) in the Cottian Alps (Italy), the external habitus of this geometrid moth is redescribed and detailed illustrations of the genitalia of both sexes are provided. Genitalia structures are compared with the taxonomically closest species-group taxa within the genus Glacies Milliere. Brief remarks about habitat associations and phenology are also given. It is concluded that, contrary to views proposed in the literature during the past 50 years, G. belzebuth is a distinct species and neither a subspecies of G. noricana nor G. bentelii. The new records of G. belzebuth are the first from Italy.