ento.psu.edu "Carpenter Bees (Entomology)" Xylocopa virginica "Carpenter Bees (Entomology)" ”Carpenter Bees Xylocopa virginica” ”Carpenter Bees Xylocopa virginica” http://ento.psu.edu/extension/factsheets/carpenter-bees Carpenter Bees http://ento.psu.edu/extension/factsheets/carpenter-bees http://ento.psu.edu/extension/factsheets/carpenter-bees http://ento.psu.edu/extension/factsheets/carpenter-bees Penn State University Entomology