A study of the nuptial flights of Solenopsis invicta Buren was carried out using self-made collection equipment．A total of 273 nuptial flights were observed．Nuptial flights occurred regardless the size of nests． The ratio of female to male alates in 10 618 captured individuals was 2. 1∶ 1. 167 nuptial flights were observed from female nests compared to 25flights from male nests and 81 nuptial flights observed from nests that included both females and males． Nuptial flights may occur in the same nest more than once，the proportion of male and female alates may differ between different nuptial flights fromthe same nest． Nuptial flights were observed throughout the year except November 2009 and February 2010. Two peaks of the nuptial flights were observed in April 2010 and May 2010 and from June 2009 to September 2009. There wasa positive correlation between the time of nuptial flights and the number of captured alates． Nuptial flights took place from