Entomology
Crabbe was known as a coleopterist and recorder of beetles, and is credited for discovering the first specimen of Calosoma sycophanta L. to be recorded from Suffolk. He published an essay on the Natural History of the Vale of Belvoir in John Nichols's, Bibliotheca Topographia Britannica, VIII, Antiquities in Leicestershire, 1790. It includes a very extensive list of local coleopterans, and references more than 70 species.
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