Vespa ducalis

Kojima, Jun-Ichi, Saito, Fuki & Nguyen, Lien Thi Phuong, 2011, On the species-group taxa of Taiwanese social wasps (Hymenoptera: Vespidae) described and / or treated by J. Sonan, Zootaxa 2920, pp. 42-64 : 55

Vespa ducalis ab[erration] soror du Buysson 1905 [probably Vespa mandarinia Smith 1852 ]

We failed to locate, in TARI, the following specimens that Sonan (1929) regarded as “ab. soror ”: 1 worker, Sozan, 29.IX.1926 (J. Sonan); 1 queen, Taihoku, 12.VII.1910 (J. Sonan); 1 queen, Taihoku, 23.VII.1927 (K. Shibata); 1 queen, Taihoku, 1.VIII.1927 (K. Shibata); 1 worker, Taihoku, 28.VIII.1927 (J. Sonan); 1 worker, Taihoku, 28.V.1928 (K. Shibata); 1 worker, Taihoku, 10.VII.1925 (J. Sonan). These specimens might belong to V. mandarinia as Starr (1992) pointed out.