Camponotus marcens

The brightly-coloured minor workers with a yellow-and-black gaster are most commonly encountered, often as they are running rapidly up and down Jarrah and Marri trunks. These ants will seek to evade detection by keeping to the opposite side of the tree to the side where the observer is standing. (Heterick 2009)

Distribution
Heterick (2009) - Seems to be confined to the Darling Range and southern wheatbelt (WA).

Distribution based on Regional Taxon Lists
Australasian Region: Australia.

Nomenclature

 *  marcens. Camponotus claripes subsp. marcens Forel, 1907h: 300 (s.w.) AUSTRALIA. Combination in C. (Myrmophyma): Emery, 1925b: 110. Raised to species: McArthur, 2009: 278.

Description
Length 6.5 - 11.5mm. Worker major. Head more trapeze shaped with very weak convex sides, longer than broad, strongly edged behind. Eyes set nearer to the back. The basal surface of the propodeum is horizontal, and as long as the declining surface.The mandibles less curved. The whole ant is slimmer and the legs longer. Head almost dull. The sculpture is fine and much thicker and sharper than with the type. The coarse sculpture on the forehead is similar. Golden red; the fore part of the gaster is reddish yellow. Head and upper part of the gaster, apart from the yellow gold seam of the segments, dark brown. Antennae yellowish brown. Same as the type. Worker minor. Head behind narrower than in front, with convex border (the type it is wider than in front,with a concave border behind). Thorax is much less convex, longer. Eyes smaller. Reddish gold, mandibles and anterior border of the head yellow gold, posterior of the gaster brown; antennae bright brown. Otherwise same as the major. Station 101, Mundaring Weir; Station 103, Guildford.