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Mean number of Triatoma infestans larvae found inside shelter 1 and shelter 2, and outside shelters when T. infestans was released alone in the arena (A); T. infestans was released simultaneously with Panstrongylus megistus (B); T. infestans was released before P. megistus (C); and T. infestans was released after P. megistus (D). Horizontal line indicates expected random distribution (50%) of insects between the two shelters. Error bars indicate SE.
