本文报告了汕头港区1988年10月～1989年9月蝇类密度及季节消长监测结果。汕头港区全年均有蝇类活动,共获苍蝇15653只,计4科19属,33种,未定种的93只,月平均密度43.8只/笼。3月份蝇类密度明显上升,5月出现高峰,后逐渐下降,但1988年10月为最高峰(156.7只/笼),1989年9月最低(4.76只/笼)。主要蝇属为金蝇属占48％,为优势种;次为阿丽蝇属(?)家蝇属等8种。 This paper reports the monitoring results of flies density and seasonal fluctuation in Shantou Port from October 1988 to September 1989. There were 15,663 flies, accounting for 19 families, 4 families, 33 species, and 93 undecided species in Shantou Port. The monthly average density was 43.8 / cage. In March, the density of flies increased obviously. The peak appeared in May and then decreased gradually. However, the highest level was in October 1988 (156.7 pcs / cage) and the lowest in September 1989 (4.76 pcs / cage). The main genus is genus Goldfly accounted for 48%, as the dominant species; the second is the Alyseria (?) Musca domestica 8 kinds.