This superb reference, which will be eagerly welcomed by entomologists, presents up-to-date, comprehensive keys to the 125 genera of the Zygoptera in North, Central, and South America. Descriptions, e
As Garrison (California Department of Food and Architecture, US), Ellenreider (National Scientific and Research Council, Argentina), and Louton (Smithsonian Institution, US) note in the preface, taxon
