THE ANACRONEURIA OF COSTA-RICA AND PANAMA (INSECTA, PLECOPTERA, PERLIDAE)

Twenty seven Anacroneuria species are recorded for Costa Pica and Pana ma including 18 described as new species (Anacroneuria alajuela, A. be nedettoi, A. curiosa, A. exquisita, A. hacha, A. harperi, A. holzentha li, A. marca, A. marginata, A. maritza, A. perplexa, A. talamanca, A. tornada, A. uatsi, A. varilla, A. ventana, A. zapata, A. zarpa). Redes criptions are given for nine species previously recorded from the area . Lectotypes are designated for Anacroneuria expansa Klapalek, A. annu lipalpis Klapalek, A. planicollis Klapalek and A. plutonis (Banks); A. expansa Klapalek = A. acutipennis Klapalek, A. chiapasa Jewett = A. p lanicollis Klapalek, A. dampfi Jewett = A. planicollis Klapalek, and A . tristani (Navas) = A. plutonis (Banks) are placed in synonymy. A pro visional key for males is provided.