These studies were conduced to investigate the effects of temperatures on development of each stage and distribution within tree and overwintering of mulberry scale, Pseudaulacaspis pentagona Tar. & Tozz. Growth ratio of each stage with different temperatures was not significant within range of optimum temperatures of growth. Developmental threshold and effective temperatures of each stage were $12.3^{circ}C$ and 46.9 degree day in eggs, $10.8^{circ}C$, and 183.8 degree day in first nymph, $9.8^{circ}C$ and 188.2 degree day in second nymph, $10.3^{circ}C$ and 383.0 degree day in gross nymphal stage, respectively. Longevity of female adults were 39.6 days in $18^{circ}C$, 28.4 days in $22^{circ}C$, 18.1 days in$26^{circ}C$, and 15.7 days in$30^{circ}C$. Average number of eggs in ovary and laid by individual female were 83.3 and 75.7, respectively. Optimum temperatures of growth were $22^{circ}C$-$26^{circ}C$ but all the eggs were not hatched at $35^{circ}C$. Distribution of each stage within tree in summer was great at lower part of branch and overwintering adults was dominantly located in NE-SE followed by SE-SW, SW-NW and NW-NE. Percent mortality due to cold weather was 36.2.