Abstract
Apus cancriformis has been so rarely recorded in Great Britain that it is of interest to report its occurrence in 1934. Some dried mud was collected from a pond in the New Forest district for the purpose of rearing Chirocephalus diaphanus, which was known to occur there. Distilled water was added to the mud on August 9, 1934, and larvæ were first noticed on August 12. These larvæ proved, on examination, to be those of Apus cancriformis, and not of the expected Chirocephalus. Development proceeded, but many died. One individual measuring about 6 mm. across the carapace and 12 mm. from the anterior margin of the head to the base of the caudal furca was preserved on September 29. Another was exhibited alive at the Linnean Society's reception in October last.
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HOBSON, A., OMER-COOPER, J. Apus cancriformis in Great Britain. Nature 135, 792 (1935). https://doi.org/10.1038/135792c0
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DOI: https://doi.org/10.1038/135792c0
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