This consists of 153,500 specimens of mainly dried insects, with a significant record of the local region’s biodiversity. Lepidoptera (butterflies and moths) and Coleoptera (beetles) are the main insect groups represented. The specimens are mostly British but includes specimens from Madagascar, Australia and New Guinea. Important collectors include Stuart Carlier, Antwerp Pratt, Richard South, and Ralph C. Bradley.
- The Rev Gorham British beetle collection, which includes many extremely rare species and many specimens that are the first records of the species in Britain
- Butterflies from New Guinea, which are internationally significant as specimens from the collection localities are extremely rare.