The Embryology of Dacus tryoni (Frogg.) [Diptera, Trypetidae (= Tephritidae)], the Queensland Fruit-Fly

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Abstract
The embryology of the Diptera has been investigated in only a few species and of these, only Drosophila melanogaster and Calliphora erythrocephala have been studied in detail. Fragmentary information is available for 17 species of Nematocera, several further species of acalyptrate Cyclorrhapha (all Drosophila species), 6 further species of calyptrate Cyclorrhapha, and 2 species of pupiparous Cyclorrhapha, but little attempt has been made to compare one with another. The present description of the embryology of the larva of the acalyptrate Dacus tryoni, the first of a member of the Tephritidae, provides new data on which a comparative survey of the embryology of dipteran larvae can be based. Material for this study was supplied by Dr. M. A. Bateman of the Joint Unit of Animal Ecology in the Department of Zoology, University of Sydney, from his laboratory stocks. Rearing of D. tryoni in the laboratory has been fully described by Bateman (1958) and only a brief outline will be presented here.