Crosskey (1972) found Biomyoides Matsumura, 1916 (type species Biomyoides cyaneus Matsumura, 1916, by monotypy) to be a junior synonym of Silbomyia Macquart, 1843 (https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1365-3113.1972.tb00032.x). Because Article 31.2 of the Code recommends that cyaneus (masculine) agrees in gender with Silbomyia (feminine), the generic name with which it is being combined, the former should be changed to cyanea (feminine), thus, the correct form of the new combination is Silbomyia cyanea (Matsumura, 1916). For more infomation on this nomenclatural recommendation, see Art. 31.2 of the Code (https://code.iczn.org/).