Feeding time, postfeeding defecation delay, and lif'e cycle for each stage of a cohort of recentlycolonized Mexican Triatoma dimidiata were evaluated, eLnd results were compared to existing published informationon this species. Seventy-five nymphs (4l.l7o) completed a cycle with an average time from N-I to adultof 142 + 64 days. The average span in days for each stage was 2O.2 for N-I, 17.9 for N-II, 10.1 fbr N-III, 43.6for N-IV, and 55.1 for N-V- First-stage nymphs had the highest mean feeding time (25 min) and the longestpostfeeding defecation delay (45 min). Differences among biological data from previous studies and the presentstudy confirm the importance of conducting research on the behavior of the indigenous triatomine species fromvarious countries.