"The first identification key to cover all bees in the whole of the New World north of the equator. Parallel columns of English and Spanish text, and 500 drawing and photographs detail the distinguishing features of 169 genera and provide additional information such as range, number of species and subgenera, and references to any revisionist studies. Includes a guide to using the key. Field tested. Annotation c. by Book News, Inc., Portland, Or." -- PUBLISHER.

Comprises articles on geology, paleontology, mammalogy, ornithology, entomology and anthropology.