Sylvia - Ostritsa is in Hertsayevskyi (Gertsaevsky) raion, Герца́ївський райо́н. The reference to Novoselytskyi raion is actually Kotul Ostritsa or, as it is known to locals, Mahala Ostritsa. For the sake of convenience, "Kotul" is often ignored and confuses the issue for outsiders. There is no doubt, however, among locals as to where Ostritsa is.
Many years ago some people living in Ostritsa were displaced by a huge flood of the River Prut. They relocated permanently to a portion of southeast Mahala, but were not eager to call Mahala their home. To solve the dilemma, they named their new home Mahala Ostritsa.
Mahala, Mahala Ostritsa, Buda, and Prut form the district municipality Mahala.
Mark - When researching LDS microfilms, be sure to eventually include Mahala because of the proximity and association with Ostritsa. The same applies for other nearby locations.