Yeah, but in modern China, the character '蟲' generally refers to everything related to 'insects' - including worms, bugs, etc. It's the umbrella term for creatures in the Insecta class under Arthropoda phylum, covering all life stages from larvae to adults.
As for the black magic connection you mentioned, that's about the ancient Gu poison arts from China's Miao ethnic group. They'd trap venomous insects like centipedes and scorpions together, making them fight until the last surviving (and most toxic) creature became what's called 'Gu'. Originally used for healing, it later got weaponized for assassinations. These ghostly insects with terrifying toxins became associated with witchcraft. Even today, some still practice this in China - after all, the original purpose of Gu arts was to save lives, not take them.
