Larvae of the Costa RicanHetaerina(Odonata: Calopterygidae) with comments on distribution

摘要

Abstract.The larvae of seven of the nine Costa Rican species ofHetaerina (H.capitalis, H.cruentata, H.fuscoguttata, H.majuscula, H.miniata, H.occisaandH. titia) were identified by matching their Cellulose Acetate Gel Electrophoresis (CAGE) patterns with those of adults. CAGE allows larval descriptions to be processed at a much faster rate than through traditional rearing techniques and, provided that refrigeration and a power supply are available, is relatively portable and robust. Adults ofH.capitalis, H.cruentataandH.miniatawere also reared from final instar larvae. Larvae ofH.cajaandH.semproniawere identified by site association with adults and unique suites of morphological characters. Characters on the head, antennae, labium, pronotum, legs, abdomen, and caudal appendages are described and illustrated, and a key to final instar larvae of all nine species is presented. The distribution ofHetaerinain Costa Rica is influenced primarily by the Cordillera.