Rabaglia et al. 2006: This is a species native to Asia. It seems to be well established in Mississippi based on the thousands of species collected in traps there. This is a relatively large, distinctive species that is easily distinguished from other Xyleborines. Its habits and fungal associates have been well documented in Japan by Kajimura and Hijii (1992). Hulcr and Cognato, 2010: Cnestus spp. colonize almost universally in small branches or twigs, creating bifurcating gallery following radial wood layers, or bore in soft pith of twigs, or occupy hollow twigs without excavating a gallery (e.g., C. bimaculatus). In such cases, ambrosia fungus grows on inner surface of twigs (Hulcr, pers. obs.). Beaver and Liu, 2010: The biology has been studied in Japan by Kajimura and Hijii (1992, 1994), in China by Tang (2000), and in U. S. A. by Stone and colleagues (Stone & Nebeker 2007; Stone et al. 2007). The associated ambrosia fungus has recently been described by Six et al. (2009). It is a pest of young Castanea mollissima (Fagaceae) trees in China (Zhejiang) (Tang 2000), but in USA appears to favour stressed host plants (Stone et al. 2007). Beaver and Liu, 2010: Hulcr and Cognato (2009) found the species to be associated with Hadrodemius globus (Blandford) in Thailand. Like other species of Diuncus, it is thought to be a fungal parasite of other ambrosia beetles (Hulcr & Cognato 2009).