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Austin G. T., D. D. Murphy, J. F. Baughman, A. E. Launer, and E. Fleishman. 2003. Hybridization of checkerspot butterflies in the Great Basin. Journal of the Lepidopterists’ Society, 57(3):176-192.

Balcázar-Lara, M., and K.R. Willmott. 2004. A new subspecies of Adelpha erymanthis from Mexico, with a key to identification of similar taxa (Lepidoptera: Nymphalidae: Biblidinae). Tropical Lepidoptera, 12(1-2)(“2001”): 25-38.

Daniels, J. C. 2004. BUTTERFLIES OF THE CAROLINAS: FIELD GUIDE. Adventure Publications: Cambridge, MN. 414 pp.

Daniels, J. C. 2004. BUTTERFLIES OF GEORGIA: FIELD GUIDE. Adventure Publications: Cambridge, MN. 408 pp.

Daniels, J. C. 2004. BUTTERFLIES OF OHIO: FIELD GUIDE. Adventure Publications: Cambridge, MN. 344 pp.

Debrot, A. O., and J. Y. Miller. 2004. Butterflies and moths of Curacao, Aruba and Bonaire. Caribbean Research and Management of Biodiversity (CARMABI), Curacao, Netherlands Antilles. 100 pp.

Dunford, J. C., and D. K. Young. 2004. Annotated checklist of Wisconsin darkling beetles (Coleoptera: Tenebrionidae). Transactions of the American Entomological Society, 130(1): 57-76.

Emmel, T. C., and A. Sourakov. 2004. Monarchs. Pp. 1452-1456 in J. L. Capinera, ed. Encyclopedia of Insects. Kluwer Academic Press, New York.

Hay-Roe, M. M., and R. Mankin. 2004. Wing-Click sounds of Heliconius cydno alithea (Nymphalidae: Heliconiinae) butterflies. Journal of Insect Behavior, 17 (3): 329-335. (Research feature on DISCOVERY NEWS, BBC, ANIMAL PLANET, and various media.)

Hay-Roe, M. M., S. Shapiro, J. Becnel, and D. Boucias. 2003. A newly discovered baculovirus induces reflex bleeding in the butterfly Heliconius himera (Nymphalidae: Heliconiinae). Journal of Invertebrate Pathology, 84: 59-62.

Heppner, J. B. 2004. Mexican Lepidoptera biodiversity. Insecta Mundi (Gainesville), 16(4): 171-190 (2002).

Heppner, J. B. 2004. Orange tortrix, “Argyrotaenia citrana“: a western species not in Florida (Lepidoptera: Tortricidae). Florida Entomologist, Gainesville, FL, 87(2): 235-236.

Heppner, J. B. 2004. Butterflies (Lepidoptera: Rhopalocera). Pp. 384-387 in J. L. Capinera, ed. Encyclopedia of Insects. Kluwer Academic Press, New York. 2580 pp. (3 vol.).

Heppner, J. B. 2004. Butterflies and moths (Lepidoptera). Pp. 387-428 in J. L. Capinera, ed. Encyclopedia of Insects. Kluwer Academic Press, New York. 2580 pp. (3 vol.).

Heppner, J. B. 2004. Moths (Lepidoptera: Heterocera). Pp. 1477-1480 in J. L. Capinera, ed. Encyclopedia of Insects. Kluwer Academic Press, New York. 2580 pp. (3 vol.).

Heppner, J. B. 2004. Family treatments for 118 different families of Lepidoptera (throughout the Encyclopedia). in J. L. Capinera, ed. Encyclopedia of Insects. Kluwer Academic Press, New York. 2580 pp. (3 vol.).

Heppner, J. B. 2004. ATLAS OF NEOTROPICAL LEPIDOPTERA. Checklist: Part 4A. Hesperioidea – Papilionoidea. Gainesville: Assoc. Tropical Lepidoptera, 36 + 439 pp.

Heppner, J. B. 2004. Notes on Euchlaena ‘pectinaria’ in the United States (Lepidoptera: Geometridae: Ennominae), Lepidoptera News, 2002(3-4): 6-7.

Goldstein, P. Z. 2004. Systematic collection data in North American invertebrate conservation and monitoring programs. Applied Ecology, 41: 175-180.

Goldstein, P. Z., Y. Wyner, P. Doukakis, M. Egan, H. Rosenbaum, and R. DeSalle. 2004. Theory and methods for diagnosing species and populations in conservation. Annals of the Missouri Botanical Gardens, 92:12-27.

Goldstein, P. Z., S. Hall, B. Hart, S. Roble, and J. Shuey. 2004. Evaluation of Relationships and Conservation Status within the Neonympha mitchellii Complex (Lepidoptera: Nymphalidae). Report to U.S.F.W.S., Raleigh, NC.

Matthews, D.L. & Gielis, C. 2004. Leptodeuterocopus neales: a new record for Florida and the United States (Lepidoptera: Pterophoridae: Deuterocopinae). Florida Entomologist 87(4), 621-622.

Landry, B., Roque-Albelo, L. & Matthews, D.L. 2004. Supplemental additions to the Pterophoridae (Lepidoptera) of the Galápagos Islands (Ecuador) with description of a new species of Adaina Tutt. Mitteilungen der Schweizerischen Entomologischen Gesellschaft 77: 289-310.

Sourakov, A. 2004. Night blooming plants and their insect pollinators. Pp. 1556-1558 in J. L. Capinera, ed. Encyclopedia of Insects. Kluwer Academic Press, New York. 2580 pp. (3 vol.).

Sourakov, A. 2004. Pyrrolizidine alkaloids and Tiger Moths (Lepidoptera: Arctiidae). Pp. 1857-1858 in J. L. Capinera, ed. Encyclopedia of Insects. Kluwer Academic Press, New York. 2580 pp. (3 vol.).

Sourakov, A., and T. C. Emmel. 2004. Insect conservation. pp. 595-604 in J. L. Capinera, ed. Encyclopedia of Insects. Kluwer Academic Press, New York. 2580 pp. (3 vol.).

Willmott, K. R., and J. P. W. Hall. 2004. Taxonomic notes on the genus Zaretis, with the description of a new species (Lepidoptera: Nymphalidae: Charaxinae). Tropical Lepidoptera, 12(1-2)(“2001”): 29-34.

Willmott, K. R. and J. Mallet. 2004. Correlations between adult mimicry and larval hostplants in ithomiine butterflies. Proceedings of the Royal Society of London B (Biology Letters Suppl.), 271: S266-S269.

Willmott, K. R., and J. P. W. Hall. 2004. Common Butterflies of the Ecuadorian Amazon. Museo Ecuatoriano de Ciencias Naturales, Quito. 2 pp. [in press]

Willmott, K. R., and J. P. W. Hall. 2004. Common Butterflies of Yuturi and Yarina lodge. Yuturi Lodge, Ecuador. 2 pp.