Myrmecia regularis is a species of ant endemic to Australia. A member of the genus Myrmecia in the subfamily Myrmeciinae, it was first described by American entomologist Walter Cecil Crawley in 1925. These ants are medium to large in size, measuring , and they are bright brownish-red in colour. Queens and workers share similar morphological features, but they can be distinguished by the noticeable size difference. Males also look similar, but collected specimens are too damaged to be examined properly. Myrmecia regularis is found in the south-western coastal regions, inhabiting eucalypt woodland and open forests. They nest underground and do not build mounds. Workers are active during the day and night, foraging on trees in search for prey and sweet substances such as sap and nectar. The larvae are strictly carnivorous and only eat insects that workers capture. Nuptial flight occurs around February to April, with queens shedding their wings inside the nest and mating near to their parent nest. Queens tend to look for food for their young before they hatch, taking as long as eight months to develop. Certain frog species are known to dwell inside M. regularis colonies. Taxonomy Myrmecia regularis was first described by American entomologist Walter Cecil Crawley, who provided the first detailed description of the ant in a 1925 article, "New ants from Australia - II", published in the Annals and Magazine of Natural History. The ant was described from two syntype workers Crawley collected from Albany, Western Australia, now preserved in Crawley's collection in the Oxford University Museum of Natural History. This name was initially short-lived, with Australian entomologist John S. Clark synonymising M. regularis with Myrmecia lucida, now a junior synonym of Myrmecia forficata. Clark's reasons for this were unknown, and William Morton Wheeler revived the species from synonymy, stating that specimens he and W.S. Brooks collected from southwest Australia were distinct from M. lucida, after comparing the two. Wheeler also stated that M. lucida was similar to M. forficata. Despite disagreeing with Wheeler's views, Clark noted in his publication that Wheeler's classification should be retained until the type specimen of M. lucida could be properly examined. In this same publication, Clark synonymised M. lucida with M. regularis. In 1991, entomologists Kazuo Ogata and Robert Taylor reviewed the species groups of Myrmecia. They assigned M. regularis to the M. gulosa species group, based on the morphological characters of worker ants. Description Excluding