“…The mycetomes break up at metamorphosis, as in Sitophilus oryzae (L.) (Murray & Tiegs, 1935), and the micro-organisms are found in adult mesentera and female gonads. The mycetomal micro-organisms are thought, as in some other insects (Buchner, 1953), to benefit the host weevil nutritionally (Musgrave, 1964) and are said to be inherited through the female (Koch, 1956;Musgrave & Miller, 1956). Their identity has not definitely been established (Musgrave & Miller, 1958) and they have so far, like many similar symbiotes (Brooks, 1963;Koch, i960), resisted culture (Musgrave & McDermott, 1961).…”