This species is sometimes listed as Phi flavopunctatum in Hong Kong and Mainland Chinese publications; this is an outdated name. I have also seen it featured on a stamp in Singapore, and referred to as “Delta arcuata“. I have no idea about the validity of this name, but since it appears to have structural characteristics distinguishing it from members of the genus Delta, I will stick with the current name. It can be found in Hong Kong, Taiwan and parts of China and Thailand. I did not expect to find it as far south as Singapore, but it is quite surprisingly common there. Source

Location: Choa Chu Kang – August 2021

Thanks Zestin Soh Bees & Wasps of Singapore for the ID

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