Demonax bimaculicollis (Schwarzer, 1925)

Lin, Mei-Ying, Perissinotto, Renzo & Clennell, Lynette, 2021, Census of the longhorn beetles (Coleoptera, Cerambycidae and Vesperidae) of the Macau SAR, China, ZooKeys 1049, pp. 79-161 : 79

Demonax bimaculicollis (Schwarzer, 1925)

Fig. 18

Chlorophorus bimaculicollis Schwarzer, 1925a: 28. TL: China (Taiwan); TD: SFNF.

Distribution.

Palaearctic Region: China (Hainan, Taiwan) ( Lin and Yang 2019; Danilevsky 2020).

Macau records.

Little Taipa, 4 Mar 2019, on flowers of Ligustrum sinense , R Perissinotto; ibidem 13 Mar 2019, on dead tree trunk by roadside, R Perissinotto (MACT); ibidem 25 Apr 2019, on flowers of Mangifera sp. by roadside, R Perissinotto & L Clennell (IZCAS).

Remarks.

In Macau, this species has so far only been recorded from Little Taipa Hill during March-April 1999 and ranges 8-11 mm in total length and 2-3 mm in maximum width. Adults appear to be active in daytime only during the early spring and have been observed mainly feeding on flowers of Mangifera sp. and occasionally also of Ligustrum sinense . Chou (2004, 2008) reported that adults visit flowers and leaves of Acer cinnamomifolium . Mating pairs and individuals near exit holes have also been found repeatedly on dead trunks of Zanthoxylum avicennae , indicating that this is possibly one of the host plants for larval development (RP pers. obs.).

Figures

Figure 18. Demonax bimaculicollis (Schwarzer, 1925): dorsal (A) and lateral (B) views of specimens observed on Little Taipa Hill on 4 and 13 Mar 2019, respectively (photographs: LC).