J. HYM. RES. Vol. 12(2), 2003, pp. 312-332 Food Plants and Life Histories of Sawflies of the Families Tenthredinidae and Pergidae (Hymenoptera) in Costa Rica, with Descriptions of Four New Species David R. Smith and Daniel H. Janzen (DRS) Systematic Entomology Laboratory, PSI, Agricultural Research Service, U.S. Department of Agriculture, c/o National Museum of Natural History, Smithsonian Institution, Washington, DC 20560-0168, USA, email:
[email protected]; (DHJ) Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, USA, email:
[email protected] Abstract. — Food plants and biological information are given for five species of Tenthredinidae and six species of Pergidae reared in the Area de Conservacion Guanacaste, Guanacaste Province, northwestern Costa Rica. The Tenthredinidae are Adiaclema chigiyae Smith, n. sp. on Entodon-topsis leucostega (Stereophyllaceae), Waldheimia fascipennis (Norton) on Cissus pseudosicyoides (Vi-taceae), Waldheimia suturalis (Cameron) on Cissus rhombifolia (Vitaceae), Waldheimia interstitialis (Cameron), n. comb., on Hamelia patens (Rubiaceae), and Pristiphora auricauda Smith on Primus annularis (Rosaceae). The Pergidae are Aulacomerus delictus Smith on Mesechites trifida (Apocyna-ceae), Anatlntlea bimaculata (Cameron) on Hippocratea volubilis (Hippocrateaceae), Suwatnus nigriceps (Cameron) on Psidium guajava (Myrtaceae), Acordulecera binelli Smith, n. sp., on Posoqueria latifolia (Rubiaceae), Acordulecera liami Smith, n. sp., on Erythroxylwn havanense (Erythroxylaceae), and Acordulecera dashielli Smith, n. sp., on Arrabidaea patellifera (Bigoniaceae). Several hundred wild-caught larvae of these 11 species produced no parasitoids. Redescriptions are given for Aulacom-erus daktus, Anathulea bimaculata, and Suwatnus nigriceps. This is the second of two treatments of the host plants and life histories of saw-flies reared by DHJ during the Lepidop-tera caterpillar inventory of the Area de Conservacion Guanacaste (ACG), which lies primarily in Guanacaste Province in northwestern Costa Rica. The first covered the family Argidae (Smith and Janzen 2003). Here we consider the families Ten-thredinidae and Pergidae, the adults of which may be distinguished in the key to families by Smith (1988, 1995). Symphyta larvae are keyed to family and to subfam-ilies within the Tenthredinidae by Smith and Middlekauff (1987). Though based on the Nearctic fauna, this larval key will be helpful for larvae collected in Costa Rica. Details of the methods and rearing records may be found at http://janzen.sas.upenn. edu and in Janzen (2000, in press), Schauff and Janzen (2001), Janzen et al. (2003), and Burns and Janzen (2001). Acronyms used are: INBio = Instituto Nacional de Biodiversidad, Santo Domin-go de Heredia, Costa Rica; USNM = Na-tional Museum of Natural History, Smith-sonian Institution, Washington, DC, USA; BMNH = The Natural History Museum, London, UK. Voucher numbers associated with each reared adult are expressed as, for example, "99-SRNP-4547"; full details of the voucher record and associated im-ages may be obtained at http:/ /janzen. sas.upenn.edu. TENTHREDINIDAE This is a large family in the Neotropics, with about 32 genera and over 300 species. Four of the six Neotropical subfamilies are known from Costa Rica, the largest being
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