Abstract
When the observed mating of Tabanus nigrovittatus Macquart was described to Dr. Joseph C. Bequaert, he commented on the scarcity of such reports. This encouraged me to watch particularly for such activity on the saltmarshes of Essex County, Massachusetts, during the summer of 1947. Before reporting my observations, however, it seems desirable to review the known literature on this topic. The records are widely scattered and usually consist of fragmentary notes without any clear index references.1 Consequently, students of the Tabanidae will doubtless find some omissions. The writer will be most grateful to the reader who calls such items to his attention.

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