Gebruikte literatuur:
Birkett, N.L., 1965. Migration of Bumble bees (Hymenoptera
Apoidea-Ent.Month.Mag. 92:333.
Luckham, A.M., 1906. Great migration of 'Bumble bees'
(Hymenoptera Apoidea-Entomologist 39:65.
Mikkola, K, 1978. Spring migration of wasps and Bumble
bees on the southern coast of Finland-Annales
Entomologici Fennici. 10:26.
Mikkola, K., 1984. Migration of Wasp and Bumble bees
across the Gulf of Finland (Hymenoptera Vespidea
and Apoidea). Notulea Entomologicae64: 125-128.
Owen, D.F. 1956. A migration of insects at Spring Point,
Yorkshire. Ent. Month.Mag. 92: 43-44.
Philp, E.G. 1957. Migration of Bumble bees. Ent. Month.
Mag. 93: 104.
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