Thyreus abdominalis rostratus ( Friese, 1905 )

Ascher, John S., Soh, Zestin W. W., Chui, Shao Xiong, Soh, Eunice J. Y., Ho, Benjamin M., Lee, John X. Q., Gajanur, Anya R. & Ong, Xin Rui, 2022, The bees of Singapore (Hymenoptera: Apoidea: Anthophila): First comprehensive country checklist and conservation assessment for a Southeast Asian bee fauna, Raffles Bulletin of Zoology 70, pp. 39-64 : 47

14. Thyreus abdominalis rostratus ( Friese, 1905) , Beaked Cloak-and-Dagger Bee [subspecies of Band-tailed Cloakand-Dagger Bee]

This species was collected in “ Singapore ” by Ridley in 1901 and at Ulu Pandan by an unknown collector in 1920 ( Lieftinck, 1962), and was recently rediscovered in Singapore at Nee Soon Swamp Forest in 2015 (record from a malaise trap sample shared by R. Meier and M. Foo). Lieftinck (1962) records this bee as a possible cleptoparasite of Amegilla (Glossamegilla) elephas Lieftinck, 1962 , but that large-bodied species has not been recorded in Singapore, where the only plausible host among the known fauna is Amegilla insularis (see below). We have observed Thyreus resembling this subspecies at PBS, where Amegilla insularis is the only large-bodied member of subgenus Glossamegilla known to occur.