Soldierfly forehead
Close-up of the forehead (frons) of a female Twin-spot Centurion Soldierfly (Sargus bipunctatus). I read that the name "bipunctatus" comes from 2 white spots on the frons, just above the antennae. I could find 2 small bumps (protusions, swellings) in that position but not exactly white spots. It was hard to be sure because the surface is quite shiny. Top entomologist Martin Harvey commented, "The white spots on the frons are found on several of the species in this genus, and although they tend to be a bit brighter in bipunctatus they aren't a reliable way of picking out the species. The orange spots on the abdomen pick out female bipunctatus".
Soldierfly forehead
Close-up of the forehead (frons) of a female Twin-spot Centurion Soldierfly (Sargus bipunctatus). I read that the name "bipunctatus" comes from 2 white spots on the frons, just above the antennae. I could find 2 small bumps (protusions, swellings) in that position but not exactly white spots. It was hard to be sure because the surface is quite shiny. Top entomologist Martin Harvey commented, "The white spots on the frons are found on several of the species in this genus, and although they tend to be a bit brighter in bipunctatus they aren't a reliable way of picking out the species. The orange spots on the abdomen pick out female bipunctatus".