Abstract
The mating behavior of P. hilaris was observed in the field and the laboratory. When males and females encountered each other for the first time on mulberry tree trunks, the male actively searched for or ambushed the female. Ambush occurred especially frequently when the male could not find the female on the trunk. Mating behavior was watched all day. Peaks were recognized both in the morning and the afternoon. Some males could copulate just after emergence, but most copulated 5 days later. Fifty percent of the females could copulate 10 days after emergence, actively avoiding with males before that time. Male ability to use antennae to search for females was passive from emergence day to 9 days after emergence. The male could recognize the female only when his antennae or maxillary and labial palpi touched the female. The copulation patterns of P. hilaris consist of 2 distinct stages: frequent penis insertions for a short time (first stage), and then a single long insertion (second stage). Ejaculation occurred only during the latter stage.
