NEW DATA ON KARYOTYPES AND THE NUMBER OF TESTICULAR FOLLICLES IN THE PSYLLID FAMILIES APHALARIDAE, PSYLLIDAE, CARSIDARIDAE AND TRIOZIDAE (HOMOPTERA, PSYLLOIDEA)

Karyotypes of 13 species from Taiwan (9 species) and from Holland (4 s pecies) belonging to the families Aphalaridae, Psyllidae, Homotomodae, Carsidaridae, and Triozidae are described for the first time. Karyoty pes of Bactericera maura, Cacopsylla hippophaeus, Dynopsylla pinnative na, Leptynoptera sulfurea, Macrohomotoma gladiata, Paurocephala chonch ainensis, P, sauteri, P. trematos, Sympauropsylla triozoneura, and Ten aphalara acutipennis were 2n = 24 + XO. However, the karyotypes of thr ee species are as follows: Cacopsylla sorbi 2n = 20 + XY, Heteropsylla cubana 2n = 24 + XY, and Trioza remota 2n = 14 + X0.