( 343 ) XVIII. An Intersex of Amorpha populi. Ev E. A. Cockayne, M.A., D.M., F.R.C.P., F.E.S. [Read November 15th, 1916.] The specimen was sent to me for dissection by Mr. L. W. Newman, who had noticed that although the head, thorax and wings appeared to be male, the abdomen was full and rounded like that of a female. Dissection showed that the testes were large and lobu-lated, the four follicles of the two testes forming a cluster ; whereas normally the two testes are fused and the eight follicles twisted spirally assume an almost spherical form. In the abnormal specimen the eight follicles were white, but in normal specimens the capsule of the fused organs is a deep yellow colour. Careful measurement showed that the calices, vesiculae seminales and vasa deferentia were broader and the glandulae accessoriae broader and shorter than in a number of normal males. Serial sections taken through the whole organ showed numerous spermatozoa and some spermatocytes in all the follicles, and in some there were a few objects, which appeared to be large cells with deeply stained basophile nucleus and cytoplasm. These were kindly examined by Dr. Goodrich, who thinks they are probably masses of spermatozoa closely crowded together, but they may be abnormal cells. The external genitalia were mounted and measured. The penis and uncus were both shorter and broader than in normal males, the gnathus, 10th abdominal sternite, was very short and broad, and ended bluntly instead of tapering gradually. It was only about half the length of a normal scaphium. The valves were not evenly spread, but they were of normal length. The cornuti on the vesica of the penis were fewer than normal, about forty-five small and large were counted. The normal penis has about fifty-six. No minute cornuti were seen at all, though they are usually numerous. Plate XCV, fig. 1, shows the internal organs of a normal male, fig. 2 shows those of the abnormal individual. The chief interest of the specimen lies in the fact that TRANS. ENT. SOC. LOND. 1916. — PARTS III, IV. (APRIL '17)
BioStor
