Dante's "Entomology" uses the image of a collected insect to describe being possessed by someone else. The speaker is the butterfly or beetle, caught in a net, pinned while still alive, and displayed on a wall. The poem suggests a relationship in which one person takes control, strips away what made the other individual, and keeps them hidden away.
The speaker's feelings run from pain to anger to numbness. The question "Why was it that you took me from my natural habitat" sounds hurt and accusing at once. The line about being soaked in "guilt and grief" suggests the other person's emotions were pressed onto the speaker until nothing was left to feel. Being "numb" comes after the pain, which makes it sadder.
The mood is cold, clinical and claustrophobic. The scientific language makes the cruelty feel calm and deliberate, and the final lines, about a home "where no one entered," leave a sense of isolation. The speaker's beauty is admired, but only by being taken apart and used.