Ecology and Taxonomy of Lower Rio Grande Valley Zethus
Abstract
Lower Rio Grande Valley populations of Zethus miscogaster Saussure, Z. montezuma Saussure, Z. otomitus Saussure, and Z. aztecus Saussure vary dramatically in abundance from year to year and within each year show some differences in monthly phaenology. They are active well into winter and fly on any day when the shade temperature reaches 22C. All visit the same rather wide range of flowers. They are Neotropic taxa which approach their northern limit in Texas. Z. otomitus is recorded for the 1st time from the United States.Downloads
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