Sphingonotus (Sphingonotus) rubescens

Sphingonotus (Sphingonotus) rubescens (Walker, 1870) Fig. 100 References for Socotra. Dey et al. 2021: 132, fig. 1, table S 3 b. Diagnostic notes. Sphingonotus (Sphingonotus) rubescens (Walker, 1870) has a pattern of relatively small dark spots on the tegmina with less clear transverse bands, hyaline hind wings and a characteristic strongly S-shaped intercalary vein (Mistshenko 1937). Distribution and occurrence. It is widespread in northern Africa, southern Europe, Arabia and parts of Asia (Husemann 2020; Dey et al. 2021). It was newly reported for Socotra based on one specimen collected in 2010 (Dey et al. 2021). We found one specimen in Wranik’s collection from Samha, 1999 (Fig. 100). Habitat and biology. On Socotra, one specimen was found on a gravelly slope at 150 m a. s. l. near Hadiboh. Bioacoustics. The song of this species consists of whistling and ticking sounds (e. g. Baudewijn Odé, XC 786864, accessible at https://www.xeno-canto.org/786864) and is described by Bland (1985).