I wish I could help, but I don't have any Alois listed in the book under that surname.
There are 2 Catherina's listed in the book (Katherina is the Russian spelling) - I will put their info below in case it is helpful. A;so, with the name of Alois, it might be that your ancestors were from Switzerland or the Alsace area (France/Swiss/German border area). You might want to check those areas on the internet and maybe put the info on one of the mailing lists for those areas.
MICHEL, Catherina b.05 Jan 1802 in Bischmisheim. Her parents were Johann MICHEL and Maria DIENER
Catherina Margareta MICHEL married Jacob SCHMIDT of Heiligenwald abt 1860.