1 Howard Hughes Medical Institute, Division of Biology, California Institute of Technology, Pasadena, California, United States of America, 2 Department of Entomology, Cornell University, Ithaca, New York, United States of America, 3 Department of Biology, and Evolutionary Ecology Laboratories, Brigham Young University, Provo, Utah, United States of America, 4 Department of Microbiology and Mol...