In the State of Ceará 7 courities were surveyed for tríatomines to search about the feeding behavior 1.205 tests. were made‘of what 392 gave positive result (32,5%); 7,3% for one specie of mèal 19,4%, for two, 1% for three and 3% for four. The rates for each one specíes of bugs are the foUowingmaking the test with the anti-sera forman, dog, cat, rat, sheep, chicken and marsupial: for Triatoma brasiliensis (3,9 - 20,7 - 29,0 - 1,1 - 47,5 - 16,2 - zero); for Triatoma pseudomaculata (0,5 - 53,2 - 2,1 - 1,1 - 12,1 - 51,6 and 1,1); for Panstrengylus megistus: 13,0 - 13,0 - 13,0 - 4,3 - 30,4 - 34,8 and zero.
