Fluorescence in situ hybridization with (TTAGG)n telomeric probe (green signals) on mitotic and meiotic chromosomes (counterstained with DAPI in blue) of four Triatominae species. A Triatoma infestans (2n=22), spermatogonial prometaphase B Triatoma dimidiata (2n=23), spermatogonial prometaphase C Dipetalogaster maxima (2n=22), pachytene stage D Rhodnius prolixus (2n=22), first meiotic division showing 10 bivalents and two sex chromosomes (X and Y). Scale bar: 5 µm.