Maturing drone (Plate 15)

Treat as in the preceding dissection. The testes are reduced in size, finally becoming thin, triangular, translucent scales. The seminal vesicles, having received spermatozoa, are increased in size, so are the mucus glands. If eversion has not occurred, there may yet be partial ejaculation, the evidence of which may be seen in the swelling of the ejaculatory duct near the bulb.