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Published online by Cambridge University Press: 31 May 2012
The material here dealt with has all been obtained by various individuals in the course of bird-banding operations. The habits of these flies are such that their collection is rendered somewhat difficult, for they leave their hosts the instant that the latter appear to be in difficulty and their flight is extremely quick and erratic. Nevertheless, it appears that bird-banding can be made to yield an interesting by-product in the form of increased knowledge of these parasites.