The fate ofDrosophila hydei anlagen in heteroplastic transplantations

Imaginal discs and larval brains of wildtype andlethal (3) giant larvae ofDrosophila hydei were transplanted into adult foreign hosts and examined after about 2 weeks. The transplants behaved very differently in different host species, viz. 6 species ofDrosophila, 5 other species of Diptera, and 3 species belonging to the Coleoptera or Dictyoptera, whereby the degree of incompatibility was more or less correlated with taxonomic distances. One notable exception was found in the cheese skipper,Piophila casei, an entirely compatible host.