I'm from the Colacurcio lineage and have looked into some of this. The most likely scenario is that Francesco Colacurcio came to Canada in 1888 (1901 & 1911 Census, 1929 obituary) or 1889 (naturalization certificate) while his wife Celestra and 3 children remained in Italy. Then in 1897, Celestra and the 3 children came to Canada. The fourth child, Maria, was born in Canada in 1898 after husband and wife were reunited; the other three were all born in Italy before Francesco left. The separation of the parents is the most likely explanation for the long gap between #3 Emilio (born 1888) and Maria (born 1898)