On the Variation of Species, with Especial Reference to the Insecta Followed by an Inquiry into the Nature of Genera

"On the Variation of Species, with Especial Reference to the Insecta" by Thomas Vernon Wollaston is a scientific exploration from the 1800s. It examines how insects, like those on the Madeira Islands, change and adapt based on where they live. The author believes understanding what is a species relies on noticing how things like climate, geography, and environment impact the insects. He encourages naturalists to explore and understand how insects may vary in species.