Synthesis and secretion of salivary gland proteins in Drosophila gibberosa during larval and prepupal development.

The late larvae of Drosophila gibberosa Patterson and Mainland choose different pupariation sites than the larvae of Drosophila melanogaster Meigen. Since the larvae of D. gibberosa do not attach themselves to the substratum, the salivary glands contain only a small amount of the "glue" proteins before pupariation.