. . . "Enallagma" . "Vesper Bluet" . "Arthropoda" . . "Insecta" . "Enallagma vesperum Calvert 1919" . . . "Calvert 1919" . "Coenagrionidae" . "Enallagma vesperum" . . . . . . . . . "Animalia" . . . . "Odonata" .