Howard Ensign Evans was a brilliant ethologist and systematist for whom the joy of science included lying on his belly in some remote location, digging out and diagramming a wasp's nest. During his career, Evans described over 900 species and authored more than a dozen books, both technical and popular, on a wide range of entomological and natural history subjects. Upon his death in 2002, he left behind an unfinished manuscript, intended as an update (though not a revision) of his classic 1966 work, The Comparative Ethology and Evolution of the Sand Wasps. Kevin O'Neill, Evans's...