| Landsburg, Alan; with Garrick, Edward | Insects are Coming, The |
| Lane Publishing Co. | Western Garden Book |
| Lane Publishing:Editors of Sunset Books | Western Garden Book |
| Lanham, Url | Insects, The |
| Larson, Peggy | Deserts of the Southwest |
| Laughlin, Robin Kittrell | Backyard Bugs |
| Lee, Welton L. | Guidelines for Acquisition and Management of Biological Specimens |
| Lehmkul, Dennis M. | How to Know the Aquatic Insects |
| Lepidoptera | V 1-5 |
| Levi, Herbert W.; Levi, Lorna R.; Zim, Herbert | Spiders and Their Kin |
| Lewis, T., MA Ph. D. and L.R. Taylor, DSC | Introduction to Experimental Ecology |
| Lindberg Press | Butterfly: Charted Designs |
| Line, Les, Editor | This Good Earth |
| Line, Less, ed. | This Good Earth |
| Linsenmaier, Walter | Insect World, The |
| Linsenmaier, Walter; Tr. by Chadwick, Leigh E. | Insects of the World |
| Linter, J.A. | Second Report on the Injurious and Other Insects of the State of New York |
| Little, Elbert L. | Audobon Society Field Guide to North American Trees |
| Little, Elbert L., Jr. | Southwestern Trees: A Guide to the Native Species of New Mexico and Arizona |
| Livermore, Arthur H. | How to Form and Operate a Local Alliance |
| Llorente-Bousquets, Jorge, et al | Catalogo Sistematico de los Hesperioidea de Mexico 1990 - |
| Lloyd, Monte; Dybas, Henry | Periodical Cicada Problem II. Evolution |
| Lohr, S. A.,Connors, P.G.,Stanford, J.A. | New Horizon for Biological Field Stations and Marine Laboratories |
| Longgood, William | Queen Must Die, The |
| Look Magazine | Look at America |
| Lowe, Charles H. | Arizona's Natural Environment |
| Lund, Dale | All About Tarantulas |
| Lutz, Frank G. | Fieldbook of Insects |
| Machlis, Gary; McDonough | Children's Interpretation: A Discovery Book for Interpreters |
| MacMahon, | Deserts |
| MacMahon, James A. | Deserts |
| Maeterlinck, Maurice | Life of White Ant, The |
| Maeterlinck, Maurice; Tr. by Sutro, Alfred | Life of the Bee, The |
| Mandel, Siegfried | Dictionary of Science |
| Manning, Reg | What Kind of Cactus Izzat? |
| Marquand, Ed | Art of the Butterfly, The |
| Martin, Alexander C. | Weeds, A Golden Guide |
| Martinez, Moises Armando Luis, et al | Lepidoptera de Oaxaca 1 : Distribucion y Fenologia de los Papilionoidea de la Sierra de Jaurez |
| Mash, Kaye | How Invertebrates Live |
| Mason, Herbert M., Jr. | Fantastic World of Ants, The |
| Matthews, Robert W. and Janice R. | Insect Behavior |
| Mattoni, Rudi | Delhi Sands Flower-Loving Fly: Recovery Plan |
| Mattoni, Rudi | El Segundo Blue Butterfly |
| Mayr, Ernst | Animal Species and Evolution |
| Mayr, Ernst; Linsley, E. Gorton; Usinger, Robert L. | Methods and Principles of Systematic Zoology |
| Mays, Buddy | Guide to Western Wildlife |
| Mcclaren, Milton | Environmental Literacy: A Critical Element of a Liberal Education for the 21st Century |
| McCoy, Mary M. | Desert Insects and the Web of Life |
| McDougall, W. B. | Grand Canyon Wildflowers |
| McGregor, S.E. | Insect Pollination of Cultivated Crop Plants |
| McGregor, S.E. | Insect Pollination Of Cultivated Crop Plants |
| McPhee, John | Basin and Range |
| Meinkoth, Norman A. | Audubon Society Field Guide to North American Seashore Creatures |
| Menn, Julius J.;Steinhauer, Allen L. | Progress and Prospectives for the Twentieth Century: Entomological Society of America Centennial National Symposium |
| Menzel, Peter;D'Alusio, Faith | Man Eating Bugs; The Art and Science of Eating Insects |
| Menzel, Randolf | Color Vision in Flower Visiting Insects |
| Merlin, Pinau | Field Guide to Desert Holes, A |
| Merritt, Richard W.; Cummins, Kenneth W. | Aquatic Insects of North America, Introduction to |
| Metcalf, C .L.; Flint, W.P.; Metcalf, R. L. | Destructive and Useful Insects: Their Habit and Control, 3d ed. |
| Metcalf, Z.P.; Metcalf, C.L. | Key to the Principal Orders and Families of Insects |
| Methven, Kathleen R., et al | How to Collect and Preserve Insects |
| Michener, Michener, Charles D.;McGinley, Ronald J.;Danforth, Bryan N. | Bee Genera of North and Central America (Hymenoptera:Apoidea) |
| Miller, Jacqueline Y. (ed) | Common Names of North America Butterflies |
| Miller, Millie; Nelson, Cyndi | Painted Ladies: Butterflies of North America |
| Milne, Lorus and Margery | Audubon Society Field Guide to North American Insects & Spiders |
| Milne, Lorus and Margery | Audubon Society Field Guide to North American Insects and Spiders |
| Minch, Edwin w. | Behavioral Biology of the Tarantula APHONOPELMA CHALCODES |
| Mitchell, Andrew W. | Enchanted Canopy, The |
| Mitchell, Andrew W. | Enchanted Canopy, The |
| Mitchell, Robert T; Zim, Herbert S. | Butterflies & Moths |
| Monson, Gale; Phillips, Allan R. | Checklist of the Birds of Arizona |
| Moore, Ruth | Evolution |
| Moorehead, Alan | No Room in the Ark |
| Morris, Ramona & Desmond | Men and Snakes |
| Morse, Roger A. | Complete Guide to Beekeeping, The |
| Moucha, Josef | Beautiful Butterflies |
| Moucha, Josef | Beautiful Moths |
| Munroe, Eugene | Moths of America North of Mexico: Pyraloidia: Pyralidae 13 1C |
| Munroe, Eugene | Moths of America North of Mexico: Pyraloidia: Pyralidae 13 2C |
| Munroe, Eugene | Moths of America North of Mexico: Pyraloidea |
| Munroe, Eugene | Moths of America North of Mexico: Pyraloidea Pyraloidae (Part) |
| Munroe, Eugene | Moths of America North of Mexico: Pyraloidea Pyraloidea (Part) |
| Munroe, Eugene | Moths of America North of Mexico; Pyraloidea Pyralidae (Part) |
| Museum of Victoria, Memoirs of the | Invertebrate Biodiversity and Conservation: Proceedings of the Conference |
| Myrn Institute | Orion Nature Quaterly: Insects |