Myrmeleon formicarius is a species of antlion native to Belgium and other parts of Europe.

[1] It is known to be present in the Genk nature reserve Opglabbekerzavel in 2020, according to the species inventory prepared for the city by the ecological study/advice company Mieco-effect.

[2] According to the European Environment Agency, this species has not yet been assessed by the IUCN and as such lacks an official conservation threat status.

[4] It has been suggested that there is a great deal of confusion in the distinction of individuals between M. formicarius and Euroleon nostras.

A 2020 study by Wu et al., sequenced their mitochondrial genome and found that they are most closely related to Myrmeleon immanis, another antlion species.