Bull. zool. Norn., vol. 42, pt 2, June 1985 1 77 OPINION 1321 GRANT OF NOMENCLATURAL PRECEDENCE TO EPHYDRIDAE ZETTERSTEDT, 1837 OVER HYDRELLIIDAE ROBINEAU-DESVOIDY, 1830 (INSECTA, DIPTERA) RULING. — (1) Under the plenary powers it is hereby ruled that the family-group name ephydridae Zetterstedt, 1837 is to be given nomenclatural precedence over the family-group name hydrelliidae Robineau-Desvoidy, 1830, whenever the two are subjectively considered to be synonyms. (2) The following generic names are hereby placed on the Official List of Generic Names in Zoology with the Name Numbers specified: (a) Ephydra Fallen, 1810 (gender: feminine), type species, by sub-sequent designation by Curtis, 1832, Ephydra riparia Fallen, 1813 (Name Number 2263); (b) Hydrellia Robineau-Desvoidy, 1830 (gender: feminine), type species, by subsequent designation by Coquillett, 1910, Hydrellia aurifacies Robineau-Desvoidy, 1830 (Name Number 2264). (3) The following specific names are hereby placed on the Official List of Specific Names in Zoology with the Name Numbers specified: (a) riparia Fallen, 1813, as published in the binomen Ephydra riparia (specific name of type species of Ephydra Fallen, 1810) (Name Number 2967); (b) flaviceps Meigen, 1830, as published in the binomen Notiphila fiaviceps (valid name, at the time of this ruling, of the type species of Hydrellia Robineau-Desvoidy, 1830) (Name Number 2968). (4) The following family-group names are hereby placed on the Official List of Family-group Names in Zoology with the Name Numbers specified: (a) EPHYDRIDAE Zcttcrstcdt, 1837 (type genus Ephydra Fallen, 1810) with an endorsement that it is to be given nomenclatural precedence over hydrelliidae Robineau-Desvoidy, 1830 (type genus Hydrellia Robineau-Desvoidy, 1 830) whenever the two are subjectively considered to be synonymous (Name Number 570); (b) hydrelliidae Robineau-Desvoidy, 1 830 (type genus Hydrellia Robineau-Desvoidy, 1830) with an endorsement that it is not to be given priority over ephydridae Zetterstedt, 1837 whenever the two names are subjectively considered to be synonymous (Name Number 571).
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