Abstract: The karyotypes of four species in Pentatomidae were studied in male germ cells prepared on air-dried slides stained with Giemsa. Karyotype analyses using specific software are made for the first time in pentatomid karyotypic study and model karyotype charts are presented. All the 4 species have the typic number of 14 euchromosomes for the family Pentatomidae and an X-Y sex chromosomes mechanism. But the arrangements of autosomes and sex-chromosomes in metaphase I among the four species have nothing in common with each other,The results of karyotype analyses and model charts also exhibit different features respectively.

Key words: Hemiptera, Pentatomidae, chromosome, karyotype, meiosis, model chart