@article {3545, title = {Swarm site fidelity in the sex role-reversed dance fly Empis borealis}, journal = {Journal of Insect Behavior}, volume = {13}, year = {2000}, pages = {785-796}, author = {Svensson, B. G. and Petersson, E.} } @article {3544, title = {Why insects swarm: testing the models for lek mating systems on swarming Empis borealis females}, journal = {Behav. Ecol. Sociobiol.}, volume = {31}, year = {1992}, pages = {253-261}, author = {Svensson, B. G. and Petersson, E.} } @article {3543, title = {Nuptial gift size prolongs copulation duration in the dance fly Empis borealis.}, journal = {Ecological Entomology}, volume = {15}, year = {1990}, pages = {225-229}, author = {Svensson, B. G. and Petersson, E. and Frisk, M.} } @article {3542, title = {Why do males of the dance fly Empis borealis refuse to mate? The importance of female age and size.}, journal = {Journal of Insect Behavior}, volume = {2}, year = {1989}, pages = {387-395}, author = {Svensson, B. G. , Petersson, E. and Forsgren, E.} } @article {3541, title = {Non-random mating in the dance fly Empis borealis: the importance of male choice}, journal = {Ethology}, volume = {79}, year = {1988}, pages = {307-316}, author = {Svensson, B. G. and Petersson, E.} } @article {3540, title = {Sex-role reversed courtship behaviour, sexual dimorphism and nuptial gift in the dance fly, Empis borealis (L.)}, journal = {Ann. Zool. Fenn.}, volume = {24}, year = {1987}, pages = {323-334}, author = {Svensson, B. G. and Petersson, E.} } @book {3538, title = {The Empidoidea (Diptera) of Fennoscandia and Denmark. III. Genus Empis}, series = {Fauna Entomologica Scandinavica}, number = {29}, year = {1994}, pages = {192}, publisher = {E.J. Bril}, organization = {E.J. Bril}, address = {Leiden}, author = {Chv{\'a}la, M.} } @article {3526, title = {New species of Empididae of the genera Empis, Hilara, and Hormopeza from Georgia, with a synopsis of the North American species of Hormopeza}, journal = {Annals of the Entomological Society of America}, volume = {62}, year = {1969}, pages = {292-299}, author = {Steyskal, G. C.} } @article {3522, title = {The mating behavior of Empis barbatoides Melander and Empis poplitea Loew (Diptera: Empididae)}, journal = {Journal of Natural History}, volume = {7}, year = {1973}, pages = {411-420}, author = {Alcock, J.} } @article {3521, title = {The evolution of empty nuptial gifts in a dance fly Empis snoddyi (Diptera: Empididae): bigger isn{\textquoteright}t always better}, journal = {Behav. Ecol. Sociobiol.}, volume = {45}, year = {1999}, pages = {161-166}, author = {Sadowski, J. A. and Moore, A. J. and Brodie, E. D.} }