Hycleus phaleratus, is a species of blister beetle found in China, Taiwan, Thailand, Indonesia, Nepal, India, Sri Lanka, and Pakistan.

[4] In China, the beetle is important commercially in Chinese medicine, due to the ability to biosynthesize potent defensive blistering agent cantharidin.

[5][6] The beetle was traditionally used to treat tumors, carbuncle, scrofula, poor blood circulation, pleurisy, dropsy, pericarditis, and missed menstrual periods.

[7][8] Some side effects of the crude medicine obtained from H, phaleratus can cause abdominal pain and hemorrhagic shock.

[9][10] Adults and grubs are pests on variety of agricultural crops and ornamentals such as: luffa, cowpea, Canna indica, rose, Gossypium hirsutum, green gram, okra, soy bean, tobacco and paddy.