On the phenomena of variation and geographical distribution as illustrated by the Papilionidæ of the Malayan region

Name: On the phenomena of variation and geographical distribution as illustrated by the Papilionidæ of the Malayan region
Author: Alfred Russel Wallace

By Alfred Russel Wallace

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Nature/Gardening/Animals Science - Biology

About This Book

The essay argues that butterflies, and especially the Papilionidae, furnish exceptional material for studying variation and geographical distribution because their wing patterns record minute differences. It surveys distinctive characters—such as the four-branched median wing nervure, a spur on the fore tibiae, and the larval Y-shaped neck tentacle—and links these traits to the family’s success. Using specimens from the Malayan region, the author traces local and regional differences in coloration, markings, and form, considers climatic and physical influences on those differences, and emphasizes comprehensive collecting and comparative description to reveal patterns of variation and distribution.

About the Author

Alfred Russel Wallace

Alfred Russel Wallace (1823-1913) was a British naturalist, explorer, and biologist, best known for independently formulating the theory of evolution through natural selection, a concept he presented alongside Charles Darwin. His extensive travels in the Amazon and the Malay Archipelago provided him with rich insights into biodiversity and biogeography, which he documented in works such as "A Narrative of Travels on the Amazon and Rio Negro." Wallace also contributed to various fields, including entomology and anthropology, and was an advocate for spiritualism later in life, as reflected in his book "A Defence of Modern Spiritualism." His legacy endures in the realms of science and literature, marking him as a pivotal figure in the history of evolutionary thought.