Osmond Charles Ollenbach
Osmond Charles Ollenbach was a surveyor with the Survey of India who was also a keen amateur entomologist and naturalist. He travelled across India and Burma as a surveyor with the Great Trigonometrical Survey and made collections of insects with nearly 17000 insect specimens some of which are now in the Natural History Museum, London, and at the Forest Research Institute, Dehra Dun, where he worked after retirement as an entomologist.
Source: Wikipedia
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