Bostrychus aequalis Waterhouse, 1884: 215 An annotated synopsis of the powder post beetles (Coleoptera: Bostrichidae) of Mainland China Liu, Lan-Yu Zootaxa 2021 2021-12-13 5081 3 389 419 3L7SL (Waterhouse) Waterhouse 1884 [151,615,1759,1786] Insecta Bostrichidae Heterobostrychus Animalia Coleoptera 5 394 Arthropoda species aequalis    Bostrychus aequalisWaterhouse, 1884: 215.   Distribution in mainland China:GD, GX, SH, YN ( Chu & Zhang 1997).  Other distribution. Japan, Pakistan, India, Nepal, Bhutan, Burma, Malaysia, Thailand, Laos, Vietnam, Hainan, Hongkong, Taiwan, Sri Lanka, Indonesia, Philippines, New Guinea, New Caledonia, Australia, New Zealand, USA, Europe, Africa ( Hua 2002; Liu & Beaver 2018)   Biology.The species has been reported as a pest in rubber plantations (  Hevea brasiliensisMuell. Arg.) ( Lekutai 1981; Ho & Hashim 1997; Sittichaya & Beaver 2009). Numerous host trees are listed by Beeson & Bhatia (1937), and the species is clearly polyphagous. It is likely that the size and physiological condition of the host tree is more important than its taxonomic placement. Beeson & Bhatia (1937)described the gallery system o f H. aequalis.