Collecting Methods for Tabanidae (Diptera)1

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Abstract
Each of 3 collecting methods used in faunal studies of Maryland and New Jersey Tabanidae showed selectivity,i.e., greater effectiveness for collecting some species orgenera of flies than for others. The modified Manitobatrap caught more flies of more species in the 2-year New Jersey study than the other methods used, i.e., 31 of the 35 species represented. It was most effective for Chrysopsfrigidus Osten Sacken, C. callidus Osten Sacken, C. dimmocki Hine, and C. sackeni Hine. Catches from different Manitoba trap sites varied with species and season. Use of lighter, and in some cases more elastic, materials than used in the original increased the ease of construction, assembly, and transport of the Manitoba trap and reduced its cost. The modified animal trap was generally ineffective for Tabanidae but proved to be very effective for sampling Tabanus quinquevittatus Wiedemann populations near horses. Collections of flies over the writer's head with an aerial insect net were very productive for most Chrysops represented, especially C. macquarti Philip, C.univittatus Macquart, and C. vittatus Wiedemann. The modified Manitoba and animal traps killed and preserved specimens in very good condition for taxonomic study.

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