Scale patterns of abdominal tergites of 8 populations Aedes aegypti aegypti from the Philippines were quantified (pattern values from 1 to 15 in ascending order of paleness) following McClelland's (1974) system. Many interpopulation variations existed in frequency distributions of pattern values (PV) and mean pattern values (MPV). Females were paler and showed clearer interpopulation differences in coloration than males. Darker (smaller MPV) populations included dark (PV 1-5), medium (6-10), and pale (11-15) specimens in this order of abundance. Paler (larger MPV) populations included as many as or even more pale specimens than dark or medium ones. In the intermediate populations, pale specimens were apparently fewer than dark ones but more than medium ones. In paler and intermediate populations, frequency distributions of PV were more or less bi-or trimodal. The absence of a pale basal band on tergite 2 was common in specimens of PV 1-6 (females) and 1-7 (males).