Drawn from the field guide, this handy laminated fold-up card, illustrated by Stephen Nash, focuses on the 34 species of lemur active, at least partly, during the day. Cathemeral, a word coined by Ian Tattersall, describes creatures active intermittantly during anytime of the day or night (like the Mayotte Lemur). With a checklist, range maps and key sites for watching lemurs.  (MAD49, $7.95)