[A study on chromosomes in five crickets].

This is a report on the chromosome C-banded karyotypes of four Gryllidae species in China. They are Teleogryllus occipitalis(Serville,1838), 2n=27,XO(male symbol); T.infernalis(Saussure,1877), 2n=27, XO(male symbol);Velarifictorus micado (Saussure,1877), 2n=29, XO(male symbol);Loxoblemmus taicoun Saussure, 1877, 2n=17, XO(male symbol). And another karyotype is reported as well,it is V.aspersus(Walker,1869), 2n=23, XO(male symbol). All chromosomes of the four crickets show strong paracentric C-bands, lots of the arms show strong or median terminal C-bands,and some chromosomes of V.micado show middle C-bands. In addition,the total heterochromatin content of the four crickets was shown. The cytotaxonomic significance is discussed.