MacLean 1964 Electroplax rivalis 12 June Copulation seen on top of telephone pole outside lab. (ca. 7:30 P.M.) 15 June (4:00 P.M.) Observed copulation by fork in gas line. M holding tail region of F in bill, pulls around area 1 ft. radius. After go - F moves ca. 1 ft away - assumed receptive posture : tail held up, wings down) head and body down - Ca. 5 sec - M hops on, fluttling wings. Remains ca. 6 sec, hopped off. F assumed very rigid, contracted posture - wings down, tail up, neck and head turned and pointed up. . Held rigid while F "dances" in very upright posture around bar. After 10 sec, hopped on briefly (3 sec), then off and resumes "dancing". 10 sec, move F moves 8 ft. away to feed (still moving strangely). M began to feed.