Objective To investigate the population composition and seasonal dynamics of Calyptrate flies in Yangpu district, Shanghai. Methods The cage trap and butterfly nets Methods were used to capture the flies. Results Sixty-six species (4 families, 41 genus) were collected in the area from March, 2006 to December, 2009. The dominant species was Chrysomya megacephala, accounting for 76.67%. The flies first appeared in March and gradually disappeared in December. Two peaks of the population were observed in August and November and the highest density was in November. Conclusion The fly population was abundant in this district with Ch. megacephala as the dominant species that should be properly managed. Dichaetomyia corrugicerca and Phallosphaera gravelyi were newly recorded species. Specific control measures should be implemented in August and November when fly activities reached their peak.

【Abstract】 A specimen of Dichaetomyia corrugicerca ♂ was collected from Shanghai Jiangwan airport on October 2006. It was a new record in Shanghai area. The morphological characters of this species were described, and some simple statements were also given about the typical characteristics, larvae morphology, biology and distribution of the genus.