Eosphaerophoria vietnamensis Mengual  

Species with 2nd abdominal tergum black dorsally and 2 lateral yellow maculae on 5th tergum, with notopleuron produced posterolaterally. Similar to E. marginata, but Eosphaerophoria marginata has bigger yellow maculae on the 5th abdominal tergum and narrower yellow fasciae on the 3rd and 4th terga. The male genitalia is very similar in these two species, but E. marginata has the right superior lobe broader and without a posterior tooth being very different from left superior lobe. Eosphaerophoria vietnamensis also has asymmetrical superior lobes, but the right superior lobe has a posterior tip or tooth and is thinner in the posterior section than that in E. marginata.